The BRAVO Laboratory at the US Department of Veterans Affairs in the heart of New York City is making some moves — and that’s just how Cesar Jimenez, a 77-year-old Vietnam veteran and avid marathoner who lost his right leg below the knee from a machine-gun injury, likes it. The North Plainfield, NJ, resident, who was born in Colombia and volunteered at 18 to join the service, is an active handcyclist and accomplished athlete, in large part thanks to the premier lab that’s become the gold