It's true, dogs are man's best friend. And in the Armed Forces, military working dogs go from best friends to trusted partners that our troops can rely on in the most dangerous situations.

Every day, these canines and their handlers put themselves in harm's way to serve our country — often serving in some of the toughest, most dangerous environments. They always have our backs, and right now, we need to have theirs.

That's why we're asking 50,000 patriotic Americans via email and text message to show their gratitude for our military K-9 teams by signing the USO's thank-you card before our March 31 goal deadline. So please, join us now by signing the card to show our brave military K-9 teams how grateful we are for their service and sacrifices.

Military working dogs form lifelong bonds with their human handlers as they learn to do everything from sniffing out explosives to conducting rescue operations. They risk their lives to keep us safe, and that's why it's so important to thank them every chance we get.

We need your signature to help show our military dog teams and all our courageous troops how grateful we are. Sign the card to thank our military K-9 teams now!

Thanks for standing with America's military heroes, four-legged ones included.

The USO