Pinckneyville, Ill., native Spc. Shelby Silva, a medic with the 15th Brigade Support Battalion, 2nd Brigade Combat Team, 1st Cavalry Division, th BSB, 2nd BCT, 1st Cav. Div., checks the blood pressure of an Iraqi man while an Iraqi doctor explains to him what's ailing him during a combined medical engagement in the Baghdad Zoo May 28. Troops from the 15th BSB, helped the Iraqi doctors with logistical support and security while they treated more than 80 patients during the three-hour operation.