Starting Monday, anyone planning to purchase a gun - whether it's a handgun, rifle or shotgun - must go through a criminal background check. The new provision of the Brady Law is designed to keep guns out of the hands of criminals, drug addicts, illegal aliens, and the mentally ill. It's creating some confusion among gun buyers and some concern among gun dealers. Minnesota Public Radio's Laura McCallum reports... The new National Instant Criminal Background Check works almost like a credit card verification - stores will call a toll-free number and give the gun buyer's name and date of birth while the buyer waits. The F-B-I does a computer background check and tells the store whether the sale is approved, delayed or denied. This SHOULD only take a minute or so, but some think t