Former Maryalnd Terp and Silver Spring native Lonny Baxter was arrested by Secret Service agents early this morning after witnesses reported hearing shots fired from a sport-utility vehicle near the White House. Baxter’s SUV was stopped near the intersection of 17th and I streets NW where officers found a handgun and spent casings inside his vehicle. Baxter, along with fellow passenger Irvin Martin, was charged with carrying a pistol without a license, having unregistered…