P.M. Headlines

(Jonathan Chiat): "Senate Democrats threaten nuclear option and win"

(CBS News): "Liz Cheney to challenge Sen. Mike Enzi, R-Wyo."

(USA Today): "Experts: Prosecutors failed to humanize Trayvon"

(BBC News): "Snowden applies for asylum in Russia"

(New York Times): "Barrage of cyberattacks challenge campus culture"