The nearly one and a half minute video displayed a rotating globe with the impact points of about 25 asteroids measuring more than one, and up to 600 kilotons of blast force, that struck the Earth from 2000 to 2013 (for comparison, the nuclear bomb that destroyed Hiroshima was equivalent to about 16 kilotons of TNT blast force). Of those impacts between 2000 and 2013, eight of them were as large, or larger, than the Hiroshima bomb. Only one of the asteroids, 2008 TC3, was detected in advance, some 19 hours before exploding in the atmosphere. As was the case with the 2013 Chelyabinsk meteor, no warnings were issued for any of the other impacts.