An armed police officer stands guard as pedestrians walk by at Horse Guards Parade in London, U.K., on Tuesday, May 23, 2017. At least 22 people were...
Mounted police officers patrol among pedestrians near Buckingham Palace in London, U.K., on Tuesday, May 23, 2017. At least 22 people were killed in...
An armed police officer stands guard at Horse Guards Parade in London, U.K., on Tuesday, May 23, 2017. At least 22 people were killed in a suicide...
An armed police officer stands guard as pedestrians walk by at Horse Guards Parade in London, U.K., on Tuesday, May 23, 2017. At least 22 people were...
An armed police officer stands guard as pedestrians walk by at Horse Guards Parade in London, U.K., on Tuesday, May 23, 2017. At least 22 people were...
Employees react as they are evacuated from the Arndale shopping mall in Manchester, U.K., on Tuesday, May 23, 2017. At least 22 people were killed in...
Theresa May, U.K. Prime minister, delivers a statement outside number 10 Downing Street in London, U.K., on Tuesday, May 23, 2017. At least 22 people...
Theresa May, U.K. Prime minister, delivers a statement outside number 10 Downing Street in London, U.K., on Tuesday, May 23, 2017. At least 22 people...
Theresa May, U.K. Prime minister, delivers a statement outside number 10 Downing Street in London, U.K., on Tuesday, May 23, 2017. At least 22 people...
Theresa May, U.K. Prime minister, leaves number 10 Downing Street to deliver a statement in London, U.K., on Tuesday, May 23, 2017. At least 22...
Theresa May, U.K. Prime minister, delivers a statement outside number 10 Downing Street in London, U.K., on Tuesday, May 23, 2017. At least 22 people...
Theresa May, U.K. Prime minister, leaves number 10 Downing Street to deliver a statement in London, U.K., on Tuesday, May 23, 2017. At least 22...
Theresa May, U.K. Prime minister, leaves number 10 Downing Street to deliver a statement in London, U.K., on Tuesday, May 23, 2017. At least 22...
European Union flags fly at half mast following last night's terror attack Manchester, U.K., outside the Berlaymont building in Brussels, Belgium, on...
European Union flags fly at half mast following last night's terror attack Manchester, U.K., outside the Berlaymont building in Brussels, Belgium, on...
European Union flags fly at half mast following last night's terror attack Manchester, U.K., outside the Berlaymont building in Brussels, Belgium, on...
European Union flags fly at half mast following last night's terror attack Manchester, U.K., outside the Berlaymont building in Brussels, Belgium, on...
European Union flags fly at half mast following last night's terror attack Manchester, U.K., outside the Berlaymont building in Brussels, Belgium, on...
Theresa May, U.K. Prime minister, delivers a statement outside number 10 Downing Street in London, U.K., on Tuesday, May 23, 2017. At least 22 people...
Theresa May, U.K. Prime minister, delivers a statement outside number 10 Downing Street in London, U.K., on Tuesday, May 23, 2017. At least 22 people...
Theresa May, U.K. Prime minister, delivers a statement outside number 10 Downing Street in London, U.K., on Tuesday, May 23, 2017. At least 22 people...
Theresa May, U.K. Prime minister, delivers a statement outside number 10 Downing Street in London, U.K., on Tuesday, May 23, 2017. At least 22 people...
Theresa May, U.K. Prime minister, delivers a statement outside number 10 Downing Street in London, U.K., on Tuesday, May 23, 2017. At least 22 people...
Amber Rudd, U.K. Home secretary, arrives for a meeting of the government's Cobra emergency committee in Downing Street in London, U.K., on Tuesday,...