and who can own them. white house officials say that discussion is coming, as evidenced by president obama's comments during last night's service there in newtown. this is the fourth mass shooting since president obama took office. last night he made it clear gun control is about to become a top priority of his administration. but despite national outrage after each tragedy, the number of guns in america is soaring. here's abc's correspondent pierre thomas. >> reporter: on black friday, u.s. shoppers were not just buying toys and electronics, they were also buying guns in record numbers. on that single day, the fbi did computerized background checks on more than 154,000 purchases of firearms. and in november alone, americans tried to buy a whopping 2 million guns. here are some facts that might surprise you. there are more registered gun dealers and stores than major supermarkets. more gun sellers than mcdonald's restaurants.