Dogs have a long history in the U.S. military, but they were especially prevalent in 2011. Perhaps the year's top canine soldier was the unidentified dog that joined Navy SEAL Team Six on its raid of Osama bin Laden's compound in May.
(Note: While that dog's identity remains a secret, it was most likely either a German shepherd or Belgian malinois. Pictured is a similar dog, jumping from a Chinook helicopter during an Army training exercise in March.)
2011 also featured several other big stories about heroic dogs, including: