If you could choose only two things as a staple of any war movie, they'd probably be military jargon (like "roger" in military aviation) and hand signals. Whether it's Easy Company deep behind enemy ...

The use of hand signals is a fundamental element of human communication. Hand signals work whenever there is a need for ...

Out on the open road, bikers don't rely on horns or shouting to communicate. They have their own quiet language — a system of hand signals that gets the message across without words. One of the most ...