And here's a description of what Obama called the "firefight":
The raid was conducted by a small helicopter-borne strike team...
... American and Pakistani commandos landed in the area at 1:10 a.m., local time, and raided a house. "The entire area was rocked with a massive explosion... A massive exchange of firing took place which continued for more than half an hour." Security forces have cordoned off the area.
... Mr. bin Laden "did resist the assault force" and was killed in the firefight that ensued as the strike team entered the compound.