Airman 1st Class Tiffany Streeter, 779th Medical Group medical laboratory technician and Phase II student, performs a microscopic analysis on Jan. 31, 2013 at Joint base Andrews, Md. The analysis serves as a pictorial atlas for different types of common sediment findings in a single urinary sample. (U.S. Air Force photo/Airman 1st Class Erin O’Shea)