 what just happened here thomas a b c news with the secret service director and more go ahead here with the news tonight there are fast-moving developments after the assassination attempt tonight remarkable new images here the alleged gunman seen climbing to the roof just minutes before opening fire at that rally can actually hear people in the crowd yelling to an officer pointing them out and now we learn that law enforcement was actually using that building as a staging area and how the gunman climbed onto the roof the wall outside that building