The dog in the Marine

It’s a proud day for the Marine’s official mascot Chesty XIII. In a ceremony at the Marines Barracks in Washington, the four-legged Marine was promoted to the rank of sergeant having served as a corporal since May 2010.

CNN news

NNJ today
Knock knock
Who's there?
Dog.
Dog who? (doubtful)
Believe me! ♪（≧∇≦）♪