160803-N-UZ648-078
An E-6B Mercury with Air Test and Evaluation Squadron 20 performs a flutter test over Naval Air Station Patuxent River, Md., Aug. 3, 2016. VX-20 currently supports aircraft testing on the C-2A, C-12M, C-38, E-2C/D, E-6B, C/KC-130J/T, MQ-4C, P-8A, and T-6A. (U.S. Navy photo by Erik Hildebrandt)