Complex sentence: The United States Postal Service issued a postage stamp in honor of Rickenbacker's accomplishments as an aviation pioneer in 1995 and re-printed in 1999 and re-issued in 2000.
Split into simpler sentences: The United States Postal Service issued a postage stamp in honor of Rickenbacker's accomplishments as an aviation pioneer in 1995. The postage stamp was re-printed in 1999 and re-issued in 2000.