According to nycaviation.com here is what happened:
Two Delta Air Lines jets bumped into each other at Kennedy Airport in New York Friday evening, but no one was injured.
The wing of an empty Delta Boeing 767 being towed clipped the vertical stabilizer of a loaded 767-300ER backing out from Terminal 4 for departure to Istanbul.
Delta Flight 72, carrying 193 passengers and 11 crew members, was scheduled to depart at 5:05 pm, but was delayed nearly four hours after the accident, taking off just before 9 pm.
I did a post just a few weeks back about the real dangers to life and limb when not always keeping your belt on any time you are on the airplane until it is safely at the gate.
And I am sure we all remember the AF 380 playing around with the regional jet like it was a small toy from April a year ago.
So next time you hear over the PA to keep your belts ON until the captain says it is now OK, just please do it! – René