Petty Officer 1st Class Simba Wallace, leading petty officer with Battalion Landing Team, 3rd Battalion, 2nd Marine Regiment, 22nd Marine Expeditionary Unit, treats a Haitian child's head wound during a medical aid mission in Dano, Haiti, Jan. 28, 2010. The medical mission was a part of the 22nd MEU's ongoing effort to provide relief in support of Operation Unified Response.