“Donald Trump’s near assassination presents the biggest crisis for the Secret Service in decades. At the heart of what will be a torrent of investigations: How was a 20-year-old lone shooter able to take up an exposed firing position on an open rooftop not much more than a football field away from the former president?
,” the Wall Street Journal reports.“Scrutiny is likely to focus heavily on the Secret Service’s advance work to secure buildings near the Butler, Pa., rally, including one belonging to American Glass Research where Thomas Matthew Crooks was perched when he shot at Trump.”