A pro-gun, anti-government group launched in 2009, the Oath Keepers began with a rally in Lexington, Massachusetts - site of one of the first battles in the Revolutionary War. Its founder, Mr Rhodes, is a former US Army paratrooper who studied at Yale Law School and was once an aide to libertarian Republican congressman Ron Paul of Texas. The group is named after the oath of service that police, military and other officials take. Those taking the military oath, for instance, pledge to "suppor...