martha: gun sales skyrocketing in the wake of the san bernardino attack. some say they feel the need to protect themselves and others say they fear it will make it lawmakers make a move towards more gun control. >> since president obama was first elected americans bought more than 100 million guns. while you often see a spike in local gun sales after a gun:spree, this is nationwide. background checks on black friday topped 185,000. that it's 8,000 guns sold every hour. a phoenix gun store is offering