LONDON, ENGLAND - JUNE 04:  Britain's Prime Minister Theresa May addresses the media as she makes a statement, following a COBRA meeting in response to last night's London terror attack, at 10 Downing Street on June 4, 2017 in London, England. Prime Minister Theresa May has left the election campaign trail to hold a meeting of the emergency response committee, Cobra, this morning following a terror attack in central London on Saturday night. 7 people were killed and at least 48 injured in terror attacks on London Bridge and Borough Market. Three attackers were shot dead by armed police.  (Photo by Leon Neal/Getty Images)