John Forbes Kerry, the presumptive Democrat presidential nominee, was reportedly injured this morning while reenacting his Vietnam-era role as a Navy swiftboat commander in Boston Harbor. A campaign spokesman said the injury may prevent the candidate from delivering his acceptance speech at the Democrat convention tomorrow night. "We're just taking a wait-and-see approach right now," said the unnamed source. "John Kerry is a fighter, and when you take it to the enemy like he does, you can get hurt. He has three Purple Hearts to prove it...and now this." An emergency medical technician (EMT) on the scene said Mr. Kerry,...