"See something, say something." After the 9/11 disaster, that phrase served as a terse marching order for alert American citizens willing to help stop terror attacks on U.S. soil. "See something, say something" is superb national security advice. 9/11 demonstrated America is under attack. Every citizen can contribute to the defense effort. On Saturday, July 13, several alert citizens attending a presidential campaign rally in Butler, Pennsylvania, saw a young man lurking near a building adjacent to the fairground where presidential candidate and former President Donald Trump intended to deliver a speech. The young man was later seen on the...