Airman 1st Class Jacqueline Douglas, 87th AMDS Public Health Flight technician, prepares a Gravid trap Aug. 19, 2013, at Joint Base McGuire-Dix-Lakehurst, N.J. Gravid traps use the “stink water,” a yeasty water substance which attracts female mosquitoes who wish to lay eggs. http://www.jointbasemdl.af.mil/news/story.asp?id=123361486