Wings are pretty vital to an airplane. Engines, flight instruments, landing gear, yeah, these are all things you definitely want to be sure are mechanically sound before you find yourself hurtling at 500 miles an hour six miles above the surface of the Earth. Yet even the most devoted caffeine addict would probably rather take off on time than wait three hours for the plane’s coffee maker to get fixed — so what’s the deal when you have to camp out on the tarmac because the plane can’t make you a cup o’ joe? [More]