FREDERICKSBURG, TX (AP).- Former President George H.W. Bush is helping dedicate a $15.5 million gallery expansion that carries his name at the National Museum of the Pacific War in Texas. Bush is expected at the museum in Fredericksburg on Monday, the 68th anniversary of the Pearl Harbor attacks. Bush was a World War II naval aviator and survived being shot down by the Japanese over the Pacific. The museum expansion has been planned for about a decade. It takes