The United Nations suddenly had a brand-new trouble spot on its hands last weekthe United Nations. In the U.N. Plaza on Manhattan's East Side, massed pickets brandished placards (INVADE CUBA NOW) and jeered at Communistbloc delegates. A knife-toting woman tried to claw her way inside. Three demonstrators shinnied up a flag pole and hauled down the Soviet flag.
A backfiring truck threw cops into a panic. At the climax of the demonstration, an explosiona real oneresounded on the water side of the sleek, glass-skinned building as a 9-lb. shell splashed into the East River just 200 yds. away. In a...