By Josh Smith, Joori Roh and David Brunnstrom SEOUL/WASHINGTON (Reuters) -The United States and South Korea held joint maritime exercises involving a U.S. aircraft carrier on Friday, a day after Seoul scrambled fighter jets in reaction to an apparent North Korean bombing drill. The United States also announced new sanctions on Friday in response to North Korea’s latest missile launches this week, targeting a fuel procurement network that it said supports Pyongyang’s weapons programs and its military. South Korea’s Joint Chiefs of Staff said the maritime drills with the USS Ronald Reagan Carrie…