Holy hand-grenade, batman! That was close. Two nuclear submarines collided with each other recently. The announcement came today, but the accident occured in early February, when British and French nuclear submarines ran into each other during underwater operations.
LOVELY! apparently the sub's locations are super-secret, even from NATO allies. And despite having a lot of ocean to play around in, they still managed to bump noses. Both subs were dented, but no nuclear material leaked out.