FORWARD OPERATING BASE MIZAN, Afghanistan -– March Madness has come to Afghanistan’s Zabul province. Afghan Capt. Hamza Jawid got a quick lesson on American culture Monday from 1st Lt. Sean Snook. The LT explained the phenomenon of March Madness to the Afghan captain over lunch after the town’s shura. Staring at the 24-year-old U.S. officer with a confused look, Jawid had trouble understanding why Americans would subject themselves to madness for fun. Grabbing his head, Snook tried to tell the captain it was a good madness. Spending this season cheering for the streaky shooting Maryland guard Grevis Vasquez, I could…