US Strategic Command apologised on Monday, 31 December, for a joke in "bad taste" after tweeting it was ready to drop something "much bigger" than the traditional Times Square crystal ball at New Year.
In a message posted, and later deleted, on Twitter, the military force that controls the US nuclear arsenal released a video in which B-2 bombers drop bombs, with the message: “If ever needed, we are #ready to drop something much, much bigger.”
STRATCOM - whose slogan is "peace is our profession" - later tweeted an apology.
"Our previous NYE tweet was in poor taste & does not reflect our values. We apologize. We are dedicated to the security of America & allies," it said.
A STRATCOM spokesperson told NBC News the images on the video showed non-nuclear bombs.