Smashed to pieces: Puerto Rico's famed Arecibo telescope collapses

Footage from a drone and a control tower of the Arecibo Observatory shows the moment its 900-ton receiver platform plunged 450 feet (140 meters) onto the radio dish below. Engineers had recently warned of the huge structure's decrepit condition, and the US National Science Foundation (NSF) announced only last month that it would be dismantled. Video: AFP