Walter Reed Medical Center in Bethesda, Maryland is hosting a welcoming ceremony for the service dog of the late George H.W. Bush. Sully joined the facility's dog program yesterday, training other dogs on how to help veterans. Sully is famous for being Bush's companion during the final chapter of his life. The 41st President of the United States was given Sully by America's Vetdogs, an organization responsible for training and placing service dogs with disabled military veterans.