After a long legal effort, transparency group and blog win document. In a nearly forgotten controversy David Gregory, then host of NBC’s “Meet the Press,” appeared on TV waving a 30-round ammunition magazine from the network’s District of Columbia studio. Gregory was aggressively interviewing the National Rifle Association’s Wayne LaPierre in December 2012, asking if it might be a good idea to ban the high-capacity magazines. His prop, ironically, violated a District of Columbia law making it illegal to possess an ammunition magazine - even an empty one - that holds more than 10 bullets.