"When we cross the border: no ID, and it's kiss yourself good-bye if Charlie gets ahold of you." In Vietnam, the Military Assistance Command's Studies and Observations Group (MACV-SOG) fielded small recon teams in areas infested with VC and NVA. Because SOG operations suffered extraordinary casualties, they required extraordinary soldiers. So when Capt. Thom Nicholson arrived at Command and Control North (CCN) in Da Nang, SOG's northernmost base camp,...