When Daniel Penny wrapped his arm around the neck of a homeless man on a Manhattan subway last year, the 25-year-old veteran ...

When Daniel Penny wrapped his arm around the neck of a homeless man on a Manhattan subway last year, the 25-year-old veteran appeared to be deploying a non-lethal chokehold long drilled into U.S.

One is 58 years old but has thrilled his fans who managed to attend his public training session, where he demonstrated an ...