Complex sentence: However, the United States now holds a significant advantage in the field of comprehensive advanced missile defense systems through years of extensive research and testing, many of the obtained technological insights were transferred to subsequent programs and would find use in follow-up programs.
Split into simpler sentences: However, the United States now holds a significant advantage in the field of comprehensive advanced missile defense systems through years of extensive research and testing. Many of the obtained technological insights were transferred to subsequent programs and would find use in follow-up programs.