Thu Feb 20,10:50 AM ET Police and Greenpeace boats collides as Greenpeace try to block the transport of U.S. military equipment from Rotterdam February 20, 2003 in protest against possible war in Iraq. The environmental group said it used its Rainbow Warrior protest ship and rubber dinghies in a bid to stop a freight ship sailing from Rotterdam, the world's biggest port, for the Gulf. The Netherlands this week gave the green light for the United States to use its ports, airports and railways to move troops and equipment.