Complex sentence: In the summer of 1948, he took the group to Germany in a show-of-force response to the Berlin blockade, and in 1951, he flew from Britain to Maine in the first nonstop trans-Atlantic flight by a jet fighter.
Split into simpler sentences: In the summer of 1948, he took the group to Germany in a show-of-force response to the Berlin blockade. In 1951, he flew from Britain to Maine in the first nonstop trans-Atlantic flight by a jet fighter.