Bob Costas' controversial discussion on gun violence

It has become all too predictable and all too frequent. An incident of gun violence occurs -- in this case, Kansas City Chiefs player Jovan Belcher shooting his girlfriend then himself -- and some express their concern. Immediately, there is an outcry from gun enthusiasts to remind us that guns don't kill people. Bob Costas experienced some of that in his comments on his "Sunday Night Football" telecast, and conservatives were quick to pounce.