Smithfield — Maj. Dennis McCool is no stranger to war. A retired Army officer, McCool, 60, began his 20-year Army career at the height of an unpopular war. His deployment to Vietnam, where more than 58,000 American soldiers died, lasted for several years. “I have lived for 38 years with a burden that every Vietnam veteran carries,” says McCool, a native of Sanford, Fla. “That burden is that we did not win. It was not our fault... Since returning home in December, the trio has embarked on another mission: to rally support for the troops. They set out on March...