May 18, 2003 |
One day in the early 1970s, as the Vietnam War dragged on and the antiwar movement gathered steam, students at the University of Pennsylvania seized the campus quadrangle and barricaded themselves behind its iron gates. Mayor Frank L. Rizzo sent in the Philadelphia police. Just so there would be no misunderstanding, the cops rolled up in a Sherman tank with a 75-millimeter cannon. "Everyone sort of assumed it wasn't loaded, but no one wanted to find out," Michael H.