Complex sentence: Their evidence gave clear picture of strange aerial objects tampering with the function of U.S. Inter-Continental Ballistic Missiles in an effort to show that high level government operatives were covering up knowledge relating to UFO incidents that pose a threat to national security.
Split into simpler sentences: Their evidence gave clear picture of strange aerial objects tampering with the function of U.S. Inter-Continental Ballistic Missiles. It alleged that high level government operatives were covering up knowledge relating to UFO incidents that pose a threat to national security.