Complex sentence: There were, however, no parades or testimonial dinners for him or any of the other "Enola Gay" crewmen, although Tibbets later received an invitation from President Harry S. Truman to visit the White House.
Split into simpler sentences: There were, however, no parades or testimonial dinners for him or any of the other "Enola Gay" crewmen. Later on, Tibbets received an invitation from President Harry S. Truman to visit the White House.