The chief of U.S. transportation command says he is worried daily that advanced, shoulder-fired anti-aircraft missiles will show up on the battlefield in Afghanistan or along the routes to fly there that could threaten strategic airlift. In particular, classified State Dept. cables have voiced concerns about Chinese weapons and trainers having connections with the Taliban. “Today [that threat] could change,” says Air Force Gen. Duncan McNabb. “I want us to stay ahead of it, with all of our international partners, [by being aware] these things might happen. We don’t talk a lot about it, we readjust. Even though it’s not...