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Philip Ewing

Philip Ewing is NPR's national security editor. He helps direct coverage of the military, the intelligence community, counterterrorism, veterans and other topics for the radio and online. Ewing joined the network in 2015 from Politico, where he was a Pentagon correspondent and defense editor. Previously he served as managing editor of Military.com and before that he covered the U.S. Navy for the Military Times newspapers.

Updated at 9:31 a.m. ET

The latest political sandstorm in the Russia saga is over four pages of paper that have never seen the light of day. Here's what you need to know to make sense of what's going on with this story.

1. What exactly is this memo that everyone is talking about?