ATLANTA (AP) - James E. "Chip" Carter III, the son of former President Jimmy Carter, announced Monday he will lead a delegation of citizen ambassadors to Iran in May. Carter, 48, is vice president for International Development with The Friendship Force, a worldwide nonprofit group based in Atlanta. President Carter, whose term in office was blemished by the Iranian hostage crisis, announced the founding of the group in 1977. Since then, the Friendship Force has dispatched more than 500,000 citizen ambassadors in 3,600 volunteer clubs in 48 U.S. states and 60 nations. 2/15/99