Security experts are slamming the 'failed' institutional protection at the White House Correspondents' Dinner after the attacker’s manifesto revealed he walked into the venue 'unchecked' despite a massive vehicle perimeter. #fox #media #breakingnews #us #usa #new #news #breaking #foxnews #crime #crimenews #crimestory #criminal #police #washingtondc #washington #dc #shooting #security #whitehouse #media #event #secretservice #investigation #law #justice #safety #america Don’t just watch Fox News—