When Lang returned to the United States in May 1950, he became Bureau Head in Boston, Massachusetts. In 1952, he wrote about John F. Kennedy becoming Senator of Massachusetts. From 1954-1960, he served as Bureau Head in Washington, D.C.. After becoming Bureau Head in Paris in 1960, Lang traveled to Spain to help his old friend Ernest Hemingway publish "The Dangerous Summer". Hemingway called it an addendum to "Death in the Afternoon" (1938). Hemingway persuaded Lang to let him print the manuscript, along with a picture layout, before it came out in hardcover. Although not a word of it was on paper, Hemingway agreed to the proposal. The first part of story appeared in "Life" on September 5, 1960 and was followed by two more installments.