U.S. Marine Corps photo by Lance Cpl. M.C. Nerl/Released 090519-M-0000D-000.jpg
May 19, 2009
Sgt. Nick Brandau, an instructor with the Unit Training Group aboard Mountain Warfare Training Center Bridgeport, Calif., gives a class to other instructors about using appropriate knot tying techniques when rappelling and rock climbing May 29.
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