Cold Warrior Leon Eisenhauer worked with coded messages in the 1950s, sometimes in NATO trucks not far from the East German border. MAHOMET — Cold Warrior Leon Eisenhauer worked with coded messages in the 1950s, sometimes in NATO trucks not far from the East German border. When he was transferred into the engineering corps, an officer told him not to shoulder his rifle. "But in those trucks, I had a carbine with me," Eisenhauer said. read more