512th Airlift Wing lieutenant colonel promotions Published Sept. 13, 2009 512th Public Affairs DOVER AIR FORCE BASE, Del. -- Congratulations to the following 512th Airlift Wing officers who were selected for promotion to lieutenant colonel. Their effective dates are below. - Lee Merkle, Sept. 29, 2009 - Erik Oliger, Oct. 1, 2009 - Scott Steere, Sept. 1, 2010