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)

Every day, Soldiers complete training, licensing, and certification programs that help them succeed in the Army and in the private sector. Learn what's available to you when you join our team at http://spr.ly/6185MxT11. 📷: Pfc. Trevor Seiler, Pat Molnar, Sgt. Laurie Ellen Wash | GoArmy

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

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

Boot Camp - American teens in military training

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