Summary: U.S. Independence Day celebrations. … Baghdad Green Zone mortar attack as Vice President Joe Biden visits Iraq. … One-year retrospective: One year ago today, on July 4, 2009 Aubrey Immelman reported on North Korea’s possible motives in launching seven ballistic missiles on America’s Independence Day and provided a link to a summary of his North Korean threat assessment and psychological profile of Kim Jong-Il, prepared for the Department of Defense.