Cancel the alert over the alien invasion. That giant fireball seen by many last night over Nevada and California — at least according to the story we’re being spoon fed by U.S. Strategic Command — was “Russian space debris”:

From NBC News:

U.S. Strategic Command said the light was caused by a Russian SL-4 rocket body that reentered the atmosphere somewhere above Arizona at around 7:08 p.m. MT (9:08 p.m. ET).

The Joint Space Operation Center had been tracking the rocket body, along with 16,000 other objects, Strategic Command spokesman Lt. Col. Martin O’Donnell said in a statement. He referred other inquiries to the Russian Federal Space Agency.

A likely story. Many on Twitter shared pics and video of the “debris” last night as it streaked overhead: