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U.S. Faces Big Hurdles in Rescue Effort - WSJ.com
Damaged Infrastructure and Travel Time Slow American Response, as Pentagon Dispatches Ships, Aircraft and Thousands of Troops
"Gen. Fraser said the military had placed a brigade of the Army's 82nd Airborne Division on alert for possible deployment. Army brigades typically contain roughly 5,000 soldiers, so the deployments could push the total U.S. military commitment to Haiti to roughly 10,000."
http://online.wsj.com/article/SB10001424052748704362004575001004177885736.html