The body of America’s 41st president, George H.W. Bush, has been placed inside the U.S. Capitol building. People began lining up in the early morning hours Tuesday for the chance to honor Bush, who died Friday at the age of 94. All day, thousands of people walked by his flag-covered casket. Alongside them was someone that came into Bush’s life only recently: his service dog, Sully. Bush received Sully in June from America's VetDogs, an organization that trains dogs to help war veterans and active military members. Bush was a pilot for the U.S. Navy during World War II. His plane was shot down during a bombing mission over the Pacific Ocean. Later in his life, he developed a form of Parkinson’s disease. He used a wheelchair in his final years. Sully, a two-year-old yellow Labrador retriever, helped the former president do things such as open and close doors, pick up objects and seek help if needed. But above all, the dog was a “wonderful companion,” said Bush aide Evan Sisley.