Officials announce December promotions Published March 7, 2011 LUKE AIR FORCE BASE, Ariz. -- The following individuals, organization indicated, are promoted effective Dec. 1, 2010, (unless otherwise stated) to the rank indicated: Bernard Plaskett, senior master sergeant, 555th Red Horse Squadron Abigail Hamilton, master sergeant, 555th RHS Brett Bennett, technical sergeant, 944th Civil Engineer Squadron James Owen, technical sergeant, 944th Aeromedical Staging Squadron Erik Valenzuela, technical sergeant, 944th Medical Squadron Ashley Sizemore, staff sergeant, 555th RHS Jonathan Arnold, senior airman, 944th Security Forces Squadron Claudia Zamora, senior airman, 944th MDS (Dec. 5, 2010) Francis Levandowski, airman first class, 944th CES Michael Casanova, airman, 555th RHS (Dec. 29, 2010) Nicholas Morris, airman, 944th CES (Dec. 29, 2010)