Author: NICOLE GAOUETTE AND RYAN BROWNE, CNN

NATO leaders brace for Trump 'fireworks'

NATO leaders gathering to mark the alliance's 70th anniversary in London face multiple challenges -- including the uncertainty of what President Donald Trump might do.

Trump reverses course in Qatar call

President Donald Trump changed course on Qatar Wednesday, a day after praising a move by other Gulf nations to sever diplomatic relations with Doha, which hosts a US military base crucial to the fight against ISIS.