Edward Snowden photographed in Moscow in December 2013. (Photo by Barton Gellman for The Washington Post)

At 3 p.m. Eastern Thursday, Edward Snowden will take your questions in a livechat run by the Courage Foundation. Questions are being sourced from Twitter, on the hashtag #AskSnowden. With about an hour to go, the hashtag has been picking up. Here are some of the best questions we've seen so far.

(Here's some background on the Barrett Brown case in question.)