on june 23, 2016, 3 world trade center's core was topped out. in a ceremony held at the base of the building, a 2-ton bucket of concrete was signed by workers, and executives, including developer larry silverstein, and was hoisted up with an american flag, which was also used with the topping out of 7 and 4 world trade center, to the top of the tower. on the evening of august 11, 2016, a construction crane struck one of 3 world trade center's windows. there was a heavy wind gust at the time, and construction workers were securing the crane when it veered into a 12th-story glass panel, cracking it. no one was injured.