 President Joe Biden said Saturday that everybody must condemn the suspected assassination attempt on former President Donald Trump. Former Tulsa Police Sergeant Dave Walker has more than a decade of SWAT experience under his belt. He's even served on a presidential protective detail. Walker says he doesn't understand how a gunman could have so easily crawled onto a rooftop location 150 yards away from where Trump was giving his speech. It kind of goes beyond anything I can sense that