Sometimes man's best friend isn't so friendly. If you ever find yourself in a situation where a dog looks like it's going to attack, these tips from former Navy SEAL Clint Emerson just might save your life. In the video, he discusses what you should do and what you shouldn't do when your life is at ...

Richard "Mack" Machowicz was a true living example of an American hero. The former US Navy SEAL and "Future Weapons" host on Discovery Channel, died at the age of 51 after a long battle with brain cancer. Mack spent 10 years serving as a Navy SEAL before his career in television began. ...