David Cameron, UK Prime Minister, gestures as he speaks during a press conference at the Chancellery in Berlin, Germany, on Friday, May 29, 2015.
David Cameron, U.K. prime minister, gestures as he speaks during a news conference at the Chancellery in Berlin, Germany, on Friday, May 29, 2015. Chancellor Angela Merkel offered to help Cameron secure the changes he wants to Britain's relationship with the European Union, including the possibility of changing EU treaties if necessary (Bloomberg—Bloomberg via Getty Images)