(CNN)In Philadelphia, officials and investigators are still scrambling to determine exactly how an Amtrak commuter train derailed, killing seven. In Burundi, yesterday's report that a coup was under way is now being brushed off by the president as a "joke." And in the NFL, New England Patriots star quarterback Tom Brady has until 5 p.m. ET to appeal his DeflateGate suspension.
Live blog: Running updates on Amtrak, Burundi and DeflateGate
Stay tuned to our live blog as we bring you the latest updates on three of today's biggest stories.