 He served overseas in military intelligence and left the Army in September 1945 as a lieutenant.Returning to the "Times" in 1946 as a Washington correspondent, he followed President Truman around the country "on a ski lift, train, airplane, seaplane, tender, destroyer, crash boat, bus, jeep, ferry, and by foot," and wrote many major stories about landmark speeches and actions by Truman, including his 1948 State of the Union address, his introduction of the military draft, his multiple refusals to cut Marshall Plan funds, his June 1948 warning to the Soviets that they had the entire "free world" ranged against them, and his April 1949 assertion that he would not hesitate to use the atomic bomb again if necessary.Leviero was in the White House when two members of the Puerto Rican Nationalist Party tried to assassinate Truman at Blair House.