Las Vegas shooting
59 people were killed and at least 527 injured in Las Vegas on October 1 when a gunman opened fire from the 32nd floor of the Mandalay Bay Hotel casino which overlooked the Route 91 Harvest Country Music Festival in what has been described as the deadliest mass shooting in modern US history.
The gunman was later found to be Stephen Paddock, a 64-year-old local man who is believed to have shot and killed himself in his room where a total of 17 guns were found.
An additional 18 firearms, explosives and thousands of rounds of ammunition were found in one of his homes in Mesquite, Nevada.
Manchester Arena attack
22 people were killed and at least 120 were injured, including many children, in a suicide bombing at an Ariana Grande concert in Manchester Arena on May 22 in Britain's deadliest attack in over a decade, later found to be carried out by a terrorist named Salman Abedi.
Despite the loss of life and anger towards children being deliberately targeted, Manchester's spirit shone through under the banner of "We love MCR," with stories of homeless people helping those in need, people paying travel tickets and praise for the emergency services and medical staff all emerging.
Ariana Grande returned to Manchester along with several other pop stars such as Justin Bieber and Miley Cyrus as part of The One Love Manchester benefit concert which raised £2.5 million for the families of the bereaved and injured and was viewed live on Facebook by over 80 million people.
Daesh claimed the bombing was carried out by "a soldier of the Khilafah" and Theresa May temporarily raised the terror threat level to critical in the aftermath of the tragedy.
The Manchester Arena has opened since and Ariana Grande has become an honorary Mancunian.
Grenfell Tower fire
71 people died and over 70 were injured in a fire at Grenfell Tower in London's North Kensington on June 14 which was later found to have occurred due to the building's external cladding which caused the rapid spread of a fire which had started when a fridge freezer malfunctioned in a fourth floor flat.
In total, 250 firefighters and 70 fire engines were needed to attempt to control the blaze whilst many were trapped inside.
Although acknowledged and visited the day or next day by Mayor of London, Sadiq Khan, and Labour Leader, Jeremy Corbyn amongst others, Prime Minister, Theresa May, was criticised for having a private visit and not meeting those who lived in the tower, a decision which was said to show "a lack of empathy".
However she did visit victims of the fire the next day at St Clement's Church which had been set up as a relief centre and announced that there would be a £5 million fund for the victims of the fire alongside a promise that residents would be given new housing as close to the building as possible and was met with shouts of "coward," "murderer" and "shame on you" which was followed by some minor scuffles.
Once the cladding which was used in the tower in order to save costs despite being highly flammable became the primary reason for so many deaths, the event ignited debate across the country about fire regulations and the treatment of the privileged vs the poor across Britain.
On 9 September, The New York Times reported nearly three months on from the fire, only 24 out of 158 households rendered homeless by the blaze had been placed in permanent housing.
It was then reported in the same newspaper that 28 out of 203 households had been permanently rehoused by 31 October.
Mogadishu truck bomb
At least 300 people were killed and scores more injured after two truck bomb attacks hit Somalia's capital Mogadishu on October 14 in the deadliest attack the country has ever seen.
The first truck bomb exploded outside a hotel close to the Ministry of Foreign Affairs in the busy K5 intersection and two hours later the second truck bomb exploded in the Medina district which is also home to the Somali National University.
Somalia's government blamed the terrorist group, al-Shabab, although the extremist group did not claim responsibility for the attacks.
Egyptian mosque attack
235 people were killed after militants suspected to be part of Daesh set off a bomb and opened fire in a mosque in Egypt's Northern Sinai province.
The al-Rawda mosque in the town of Bir al-Abed was targeted during Friday prayers and it has been the deadliest attack of its kind since an Islamist insurgency in the peninsula was stepped up in 2013.
Texas shooting
26 people were killed in a mass shooting in a First Baptist Church in rural Sutherland Springs, Texas by a shooter who fled but after being pursued by a resident and police officers but was found dead after running his car off the road.
The gunman was later identified as Devin Patrick Kelley, 26, of neighbouring Comal County, Texas by authorities.
Las Ramblas terrorist attack
Thirteen people were killed on August 17 by a van which was driven into crowds on Las Ramblas in Barcelona, a popular tourist destination whilst one person was stabbed after 5 people jumped out a car hitting people in Cambrils, a coastal town 75 miles (120km) to the south.
The driver of the van on Las Ramblas was later identified as 22-year-old Younes Abouyaaqoub who was shot dead by police after several days on the run.
Police said they believed there were 12 men involved and whilst eight were dead, the remainder four appeared in court. An investigation into the men's possible international links is ongoing.
Meanwhile, around 500,000 people marched across Barcelona to condemn the attacks under the slogan no tinc por (I am not afraid).
The march was led by police and members of the emergency services, as well as taxi drivers who had helped evacuate people the during the attack and included many notable Spanish public figures.
London Bridge attack
Eight people were killed and 48 more injured on June 3 when a van drove through crowds of pedestrians on London Bridge before three individuals jumped out of the vehicle and began stabbing people in nearby Borough Market.
The three attackers were eventually shot dead by police and were later identified as Islamic extremists, Khuram Butt, Rachid Redouane and Youssef Zaghba.
New York truck attack
Eight people were killed while twelve others were injured, including two children when a rented pick-up truck drove into cyclists and runners for a mile in New York City.
The driver attempted to exit the scene carrying two guns which were later found to be a paintball and pellet gun but was instead shot by a police officer in the abdomen and arrested.
A flag and document pledging his allegiance to Daesh were found in the truck.
The FBI charged 29-year-old Sayfullo Habibullaevic Saipov, who had immigrated to America from Uzbekistan in 2010, with the destruction of a vehicle and providing material support for a terrorist organisation, plus killing eight people and injuring a dozen others.
Melbourne car ramming
Six people were killed and at least 30 others were injured, three of whom sustained critical injuries, when a car was driven into pedestrians in the city centre of Melbourne, Australia.
The driver of the vehicle, 32-year-old Dimitrious "Jimmy" Gargasoulas who had previously been remanded into custody and was known to police as having a history of drug abuse, familial violence and mental health problems was arrested by an off-duty police sergeant who was on the scene within 15 seconds of the incident.
Amtrak train derailment
Three people were killed and over 100 others injured when a passenger train on a newly opened high-speed Amtrak route derailed onto a busy highway in Washington State.
There were 77 passengers on board alongside seven crew members, Amtrak said over 100 people were sent to local hospitals, with over a dozen of them suffering serious or critical injuries, some of whom also required surgery.
Some of those who were injured were in vehicles on the motorway that the train fell onto rather than within the train itself.
The train which was making the inaugural run of a new service from Seattle to Portland had been travelling at 80 miles per hour instead of the permitted 30 miles per hour.
Parsons Green tube explosion
29 people including a young boy were injured on September 15 after a bomb partially detonated and created a ball of fire along a carriage of a train at Parsons Green in West London.
As a result, Theresa May said that Britain's terror threat level had been raised from severe to critical and armed police and members of the military were deployed at public places across the country.
Daesh ultimately claimed responsibility for the attack and responsibility for the investigation was quickly handed to Scotland Yard’s counter-terrorism command.
Donald Trump inauguration
Donald Trump was controversially inaugurated as the 45th President of the United States after winning the election last year on January 20.
His most controversial moves in his first year as President include his withdrawal from the Paris climate agreement, the "travel ban" for nationals from Muslim-majority countries - which has been partially overturned since - and most recently, his decision to recognise Jerusalem as the capital of Israel.
He and his team are also being investigated for Russia's possible attempt to sway the election result in favour of Trump although the President has repeatedly denied any Russian involvement.
Women's Marches also took place across the world on January 21 to advocate for women's rights as well as other human rights issues in response to Trump's inauguration as President the day before due to his ongoing statements and rhetoric during his campaign which they claimed were misogynistic. In the USA, it was the largest single-day protest in the country's history.
Snap general election
Prime Minister, Theresa May, surprised everyone by announcing a snap general election in April in an attempt to strengthen her role as Prime Minister before entering Brexit negotiations.
However, this seems to have largely backfired for her as when results were revealed after the June 8 vote left her without a majority in Parliament, forcing her to link up with Northern Ireland's DUP party in a bid to strengthen her own government.
Robert Mugabe resigns
Mere days after Zimbabwe's former President, Robert Mugabe, made the controversial decision to sack his deputy, Zimbabwe's military placed him under house arrest.
Mugabe who was the country's leader for almost four decades was sacked as leader of the ruling Zanu-PF party and impeachment proceedings were launched against him.
Prince Harry and Meghan Markle engaged
Prince Harry and Meghan Markle revealed they were engaged on October 27 after dating for a year and a half.
In an interview the couple revealed that Harry, 33, proposed to Suits actress, Meghan, 36, during a “typical night in” over a roast chicken dinner.
They are set to wed at St George's Chapel, Windsor Castle, in May 2018.
