HONOLULU — “Welcome aboard the Theodore Roosevelt.” Standing beneath rows of fighter jets on the flight deck of the USS Theodore Roosevelt (CVN-71), Capt. William Mathis greeted visiting reporters with a smile before introducing the warship in a few simple words. “This is a floating city.” The Nimitz-class nuclear-powered aircraft carrier carries about 3,000 sailors assigned to the ship and another 2,000 with Carrier Air Wing 11. “We go out to sea and we run four and a half acres (1.8 hectares) of sovereign U.S. territory,” Mathis said. “It’s a floating airport, and really it’s a floating city.” Moored at Joint Base Pearl Harbor-Hickam during this year’s Rim of the Pacific Exercise (RIMPAC), the carrier’s flight deck was lined with F/A-18 Super Hornets, F-35C Lightning II fighters, EA-18G Growlers and E-2D Hawkeye airborne early warning aircraft. Sailors moved steadily between aircraft and maintenance equipment as the ship prepared to get underway. Commissioned in 1986, Theodore Roosevelt marks its 40th anniversary this year. Yet Mathis said the ship’s age matter