Former DHS official on challenge of protecting President Trump
DHS
ABC News contributor John Cohen explains how the alleged gunman avoided vetting by authorities at the White House Correspondents' Association Dinner. Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News Digital is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/7 coverage of breaking news and live events on
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