CORAL SPRINGS, Fla. (AP) — The family of a former FBI agent who disappeared in Iran nine years ago while on a CIA mission is holding a rally Saturday demanding that the U.S. government keep pushing for his freedom.Robert Levinson, 67, disappeared from Iran's Kish Island in March 2007. A 2013 Associated Press investigation revealed that the married father of seven was working for the CIA on an unauthorized intelligence-gathering mission to glean information about Iran's nuclear program.If Levinson remains alive, he has been held captive longer than any American, longer than AP journalist Terry Anderson, who was held more than six years in Beirut in the 1980s.