(click to enlarge)
This appears to be Washington St., south of the WTC, looking north towards Liberty St. You can see the base of WTC2 in the background.
But lots of bloody chunks here-- presumably people blown up from the WTC1 hit.
I feel compelled to point out the blue debris, when zoomed in, looks like a piece of fuselage matching the window area of an AA plane.
It's not clear if the south tower has been hit yet, but probably. The crazy thing is that this is a HUGE amount of debris to be blown from the exit side of the North tower, but it's hard also to see this being blown back from the entry side of the South tower.