Biden vs. Wal-Mart on gun control

Wal-Mart officials made the right decision to participate in [today's discussions](http://abcnews.go.com/Politics/OTUS/sandy-hook-elementary-biden-includes-nra-wal-mart/story?id=18174779) with Vice President Joe Biden over the future of gun control in America. Over the years Wal-Mart has become a leading - legal - seller of assault weapons and guns used to kill people in this country. Biden wants ...