This week's greatest fails from across the world remind us that humans designed weren't made with wheels for a reason, exercise is dumb, and it's okay to laugh at cows and children. Enjoy the internet's worst, it's another fantastic Fail Friday. | FailArmy

Military working dogs are an integral part of the warfighting force. Just like their human counterparts, they can hold a variety of jobs. Watch these working dogs train to ensure they’re ready for action at a moment’s notice. #KnowYourMil | U.S. Department of Defense (DoD)

Your career in the Air Force officially begins at Basic Military Training. Are you ready to face the challenge? http://spr.ly/6181ErrWD | U.S. Air Force Recruiting

697K views · 7.9K shares | As you get ready to start your weekend, watch as our newest Sailors graduate boot camp and get ready to start their #USNavy careers. | U.S. Navy | Facebook

Many teenagers join the camps with hopes of starting a career in the military, rather than struggle through traditional high schools. It's a tough process for both the boys and the girls. | Free Documentary

459K views · 3.9K reactions | It’s been called one of the most demanding assignments in the Navy — but also one of the most rewarding. Coming September 30, follow along as we take you behind the scenes and show you what life is like for the men and women who train the next generation of Sailors at Navy Boot Camp. Do you think you have what it takes to join them? | U.S. Navy | Facebook