Rondell Henry, inspired by ISIS, stole a U-Haul van to use in an attack, according to prosecutors. He also allegedly tried but failed to get past security checkpoints at Dulles International Airport. After driving around Washington, D.C., while looking for a suitably large crowd to drive the van into, Henry allegedly broke into a boat and hid inside overnight. Police recovered the stolen van while Henry was in the boat. Henry provided the details of his alleged plot to investigators after his arrest.