Getty Images : "..Explosion rocks one of the World Trade Center Towers..."

Getty images http://www.gettyimages.com/ has a large collection of 9-11 related images .
You can not see the full-resolution images at the site (it's a shop) but still an excellent source
for researchers .
I found them by making a date-search for the period 9-11-2001 - 9-12-2001 . Interestingly, this also brings up images
from the USS George Washington, reported by USAToday to be anchored off Long Island on 9/11 http://home.att.net/~south.tower/911AirBase1.htm
Also see http://memes.org/russians-say-a3-navy-jet-struck-pentagon-launched-uss-george-washington

Below are some examples of images they have for sale :

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"World Trade Center Hit by Two Planes
394263 01: (PUERTO RICO OUT) An explosion rocks one of the World Trade Center Towers crumbled down after a plane hit the building. (Photo by Jose Jimenez/Primera Hora/Getty Images)

Image #: 1161244
License type: Rights-managed
Photographer: Jose Jimenez/Primera Hora/Stringer
Collection: Getty Images News
Source: Getty Images North America
Credit: Getty Images
Date created: 11 Sep 2001
Object name: 39426301blas_20010919_00253.jpg
Copyright: 2007 Getty Images
Max file size/dimensions/dpi: 17.2 MB / 27.78 x 41.67 in. (2000 x 3000 px) / 72dpi"

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"Image #: 51722635
License type: Rights-managed
Photographer: DOUG KANTER/Stringer
Collection: AFP
Source: AFP
Credit: AFP/Getty Images
Date created: 11 Sep 2001
Bar code: AFP
Object name: APW2001091109775
Copyright: 2007 Getty Images
Max file size/dimensions/dpi: 8.90 MB / 20 x 30 in. (1440 x 2160 px) / 72dpi"

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Any idea the time and location of the 2nd Picture?

My guess the location it was taken from was around Church Street looking west?

Was this before or after the 2nd Tower fell?

The reason why I ask is because you can see WTC 7 and there's no signs of major damage to the south side of the building.

Also in regards to WTC 4, (I believe that is the building where all the steel bent over), I had assumed it was caused by fire, but it's clear in this picture that WTC 4 bent before that was a fire. So how did that happen?

Before, I think ..

There are several of Doug Kanter's images here, shot between the "collapses" :
http://picasaweb.google.com/TirNanOg.NationStates/Collection/photo#50161...
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"Listen carefully now : DO NOT DESTROY OIL-WELLS" Dubya