NEW YORK -- America's current anti-war movement is resourceful and persistent, but often seems to lack the vibrancy of its counterpart in the Vietnam era when protesters burned draft cards, occupied buildings and even tried to levitate the Pentagon. The biggest difference, say activists and historians, is the lack of a draft. Today's college-age youth face no threat of conscription to fight in Iraq, and campuses are more tranquil than during Vietnam. "We're not as unified, not as hard-core, not as big," said Frida Berrigan, 32, a board member of the War Resisters League and daughter of the late peace...