LOWELL, Mass. — The lawyer for a 71-year-old Marine Corps veteran charged with pulling a gun during a road rage confrontation in Massachusetts says the man only showed a weapon because he felt threatened.The Lowell Sun reports that an attorney for Roger Buonanno said his client felt threatened when he approached three men in a driveway in Billerica, one of whom was also armed.Prosecutors say Buonanno, of Tewksbury, had followed the men when he was cut off by their vehicle Saturday.