Complex sentence: The following day Thompson was given a short protest note by the Soviets, the U.S. issued a short note of apology, and Tosolini also apologized, allowing the plane to leave.
Split into simpler sentences: The following day Thompson was given a short protest note by the Soviets,. The U.S. issued a short note of apology, and Tosolini also apologized, allowing the plane to leave.