Tuesday's school attack in Uvalde, Texas, where at least 19 children and a teacher were killed is just the latest in an unrelenting series of massacres across the US.
Many remember the 1999 Columbine High School shooting, where 13 were killed, as the forerunner of mass shootings, but deadlier massacres have occurred since then.
Here is a look of 10 events that shocked the nation:
2017 music festival shooting in Las Vegas
The country's deadliest mass shooting caused 58 deaths after a gunman opened fire at the Route 91 Harvest music festival on the Las Vegas strip in Nevada. More than 540 people were injured.
The gunman shot himself in the hotel suite from which he was shooting and a motive was never uncovered.
2016 Pulse nightclub shooting in Orlando
Forty-nine people were killed at Pulse, a gay nightclub, by a gunman in Orlando, Florida. The shooting took place during Pride month in June, a time when LGBTQ+ people celebrate their community.
The shooter was fatally shot by police.
2007 Virginia Tech University shooting
Thirty-two people were killed in a mass shooting at a university in Blacksburg, Virginia. The gunman killed himself.
2012 Sandy Hook school shooting in Newtown, Connecticut
A gunman entered a primary school in Newtown, Connecticut, and killed 26 people.
Twenty children aged between 5 and 10 years old were among those dead. There were louder calls for gun control action shortly afterwards, as tragic photos of young children were published.
2017 church shooting in Sutherland Springs, Texas
A former member of the US Air Force killed 26 churchgoers at First Baptist Church in Sutherland Springs, Texas.
He was let go from the force for beating his wife and child, and the church he attacked was one attended by his in-laws.
2019 Walmart shooting in El Paso, Texas
Twenty-three people shopping at a Walmart store in El Paso, Texas, were killed by a gunman.
The Mexican government at the time tried to have the US government of then-president Donald Trump call the border event an act of terrorism.
2018 Marjory Stoneman Douglas school shooting in Florida
Seventeen pupils and teachers were killed by a former pupil at Marjory Stoneman Douglas High School in Parkland, Florida.
The massacre compelled surviving pupils to launch a national youth movement, holding protests and gatherings calling for gun control, called "March for our Lives".
2022 school shooting in Uvalde, Texas
The newest addition to the top deadliest US mass shootings was on Tuesday, when a gunman killed 19 people at Robb Elementary School.
Texas officials said on Tuesday evening that 19 pupils were killed, along with a teacher. The gunman also shot his grandmother before the rampage, authorities said.
2015 office party shooting in San Bernardino, California
A gunman killed 14 people at an office party in San Bernardino, California.
2009 Binghamton shootings in New York state
Thirteen people were killed in a shooting at the American Civic Association immigration centre in Binghamton, New York. The shooter killed himself.
Reuters contributed reporting. Numbers from Gun Violence Archive.
Babumoshai Bandookbaaz
Director: Kushan Nandy
Starring: Nawazuddin Siddiqui, Bidita Bag, Jatin Goswami
Three stars
Tuesday's fixtures
Kyrgyzstan v Qatar, 5.45pm
The specs
Engine: 2.0-litre four-cylinder turbo
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Torque: 280Nm at 1,350-4,200rpm
Transmission: seven-speed dual-clutch auto
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The President's Cake
Director: Hasan Hadi
Starring: Baneen Ahmad Nayyef, Waheed Thabet Khreibat, Sajad Mohamad Qasem
Rating: 4/5
Milestones on the road to union
1970
October 26: Bahrain withdraws from a proposal to create a federation of nine with the seven Trucial States and Qatar.
December: Ahmed Al Suwaidi visits New York to discuss potential UN membership.
1971
March 1: Alex Douglas Hume, Conservative foreign secretary confirms that Britain will leave the Gulf and “strongly supports” the creation of a Union of Arab Emirates.
July 12: Historic meeting at which Sheikh Zayed and Sheikh Rashid make a binding agreement to create what will become the UAE.
July 18: It is announced that the UAE will be formed from six emirates, with a proposed constitution signed. RAK is not yet part of the agreement.
August 6: The fifth anniversary of Sheikh Zayed becoming Ruler of Abu Dhabi, with official celebrations deferred until later in the year.
August 15: Bahrain becomes independent.
September 3: Qatar becomes independent.
November 23-25: Meeting with Sheikh Zayed and Sheikh Rashid and senior British officials to fix December 2 as date of creation of the UAE.
November 29: At 5.30pm Iranian forces seize the Greater and Lesser Tunbs by force.
November 30: Despite a power sharing agreement, Tehran takes full control of Abu Musa.
November 31: UK officials visit all six participating Emirates to formally end the Trucial States treaties
December 2: 11am, Dubai. New Supreme Council formally elects Sheikh Zayed as President. Treaty of Friendship signed with the UK. 11.30am. Flag raising ceremony at Union House and Al Manhal Palace in Abu Dhabi witnessed by Sheikh Khalifa, then Crown Prince of Abu Dhabi.
December 6: Arab League formally admits the UAE. The first British Ambassador presents his credentials to Sheikh Zayed.
December 9: UAE joins the United Nations.
WHAT IS A BLACK HOLE?
1. Black holes are objects whose gravity is so strong not even light can escape their pull
2. They can be created when massive stars collapse under their own weight
3. Large black holes can also be formed when smaller ones collide and merge
4. The biggest black holes lurk at the centre of many galaxies, including our own
5. Astronomers believe that when the universe was very young, black holes affected how galaxies formed
Who's who in Yemen conflict
Houthis: Iran-backed rebels who occupy Sanaa and run unrecognised government
Yemeni government: Exiled government in Aden led by eight-member Presidential Leadership Council
Southern Transitional Council: Faction in Yemeni government that seeks autonomy for the south
Habrish 'rebels': Tribal-backed forces feuding with STC over control of oil in government territory
Brief scores:
Pakistan (1st innings) 181: Babar 71; Olivier 6-37
South Africa (1st innings) 223: Bavuma 53; Amir 4-62
Pakistan (2nd innings) 190: Masood 65, Imam 57; Olivier 5-59
New Zealand squad
Tim Southee (capt), Trent Boult (games 4 and 5), Colin de Grandhomme, Lockie Ferguson (games 1-3), Martin Guptill, Scott Kuggeleijn, Daryl Mitchell, Colin Munro, Jimmy Neesham, Mitchell Santner, Tim Seifert, Ish Sodhi, Ross Taylor, Blair Tickner
UAE currency: the story behind the money in your pockets
RESULT
Bournemouth 0 Southampton 3 (Djenepo (37', Redmond 45' 1, 59')
Man of the match Nathan Redmond (Southampton)
The years Ramadan fell in May
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More about Middle East geopolitics
Stage result
1. Jasper Philipsen (Bel) Alpecin-Fenix 4:42:34
2. Sam Bennett (Irl) Bora-Hansgrohe
3. Elia Viviani (Ita) Ineos Grenadiers
4. Dylan Groenewegen (Ned) BikeExchange-Jayco
5. Emils Liepins (Lat) Trek-Segafredo
6. Arnaud Demare (Fra) Groupama-FDJ
7. Max Kanter (Ger) Movistar Team
8. Olav Kooij (Ned) Jumbo-Visma
9. Tom Devriendt (Bel) Intermarché-Wanty-Gobert Matériaux
10. Pascal Ackermann (Ger) UAE Team Emirate
THE SPECS
Jaguar F-Pace SVR
Engine: 5-litre supercharged V8
Transmission: 8-speed automatic
Power: 542bhp
Torque: 680Nm
Price: Dh465,071