"This is the logistics challenge of our generation," says Vice Adm. Mark Harnitchek, deputy commander of the U.S. military's Transportation Command, and a student of military logistics history. "The challenge of my father's generation was escorting convoys across the north Atlantic when we didn't know how to do that very well. Convoys in 1943 would lose 16 of their 32 ships. The Army had their challenge supplying Patton in his race across France, keeping him resupplied. Supporting operations in Afghanistan is our generational challenge."Logistics, always logistics.