letelier fled to the u.s. after being tortured and incarcerated under pinochet's dictatorship. he was killed in a car bomb in washington, d.c., only a mile from the white house. the declassified documents also show pinochet was so concerned about covering up his role in ordering letelier's assassination that he also planned to assassinate his head of intelligence. the guardian has obtained data showing diesel cars from four major car manufacturers are emitting significantly more pollution on the road than in their regulatory tests. tests conducted by the company emissions analytics shows that models of mercedes-benz, honda, mazda and mitsubishi all emit far more toxic pollution than previously thought. this comes as volkswagen ceo michael horn apologized for the emissions cheating scandal in his testimony to congress thursday. >> on behalf of our company and my colleagues in germany and me personally, i would like to offer the sincere apology, sincere apology for volkswagen plus use of programs that suffered -- amy: the guardian reported similar revelations about higher polluti