5.Smoking On U.S. Airliners

Smoking on a plane. Makes sense, right? No! But for decades, it was standard practice. Over time, good sense took hold, and lighting up in the cabin was crushed out like a bad butt. On June 3, 2000, the United States banned smoking on all domestic and international commercial flights. China didn't ban smoking on its flights until 2017, though reports are that it continues to allow its pilots to smoke in the cockpit.