A former CIA operative who is accused of killing 73 people in a 1976 bombing of a Cuban airliner is going on trial today in Texas. But instead of terrorism charges, Luis Posada Carriles is facing charges of perjury. The 82-year-old Cuban exile is accused of lying to an immigration judge about how he entered the United States and his role in a series of bombings in Havana in 1997. He has also been charged with several charges of immigration fraud and obstruction of a proceeding.