@CNN: George H. W. Bush’s service dog is among those mourning the former President. Here’s a look at how a nonprofit called America’s VetDogs trains pups like Sully to perform long lists of commands. https://t.co/mXhy6TrSxb https://t.co/j1F1qbRYyv

George H. W. Bush's service dog is among those mourning the former President. Here's a look at how a nonprofit called America's VetDogs trains pups like Sully to perform long lists of commands. https://t.co/mXhy6TrSxb pic.twitter.com/j1F1qbRYyv

— CNN (@CNN) December 4, 2018