A 10-year-old federal ban on assault weapons expired earlier this week with little chance that a vote to reestablish it will be brought before congress in the near future. Chris W. Cox, chief lobbyist and executive director of NRA's institute for legislative action, took questions on the association and the expiration of the assault weapons ban. The transcript follows. Editor's Note: washingtonpost.com moderators retain editorial control over Live Online discussions and choose the most relevant questions for guests and hosts; guests and hosts can decline to answer questions. Chris W. Cox: Hello, everyone. I'm glad to have the opportunity to...