'See something, say something' in Belgium?04:50
NBC News' Erica Hill speaks with Dr. Joachim Koops, dean of Vesalius College in Brussels, about what the E.U. needs to do to prevent further terror attacks on the continent.
Acting defense secretary heads to NATO summit03:44
How Trump's unscheduled press conference happened07:06
Fact-checking the president's news conference03:47
Former defense secretary expresses concerns for Putin meeting11:04
Trump creates his own narrative at press conference08:35
Trump holds impromptu conference, makes false claims15:53