Activists donned pig snouts, climbed trees and targeted Fox News Channel in protests across Manhattan on Tuesday as police arrested 260 people during a day of civil disobedience aimed at the Republican convention. Officers encircled scores of demonstrators with orange netting during a protest near the former site of the World Trade Center. Detained protesters were loaded onto an off-duty city bus, and police put the count at about 200. The demonstrators insisted they were following police orders. The protest's 500 demonstrators, a group called the War Resisters League, said they were staging a "death march" from Ground Zero to...