On August 21, 1983, Senator Aquino returned from exile in the United States, but was assassinated at Manila International Airport. Growing unrest followed, and Marcos was forced to call the snap election of 1986, where UNIDO and Partido Demokratiko Pilipino-Lakas ng Bayan participated and nominated Aquino's widow Corazon Aquino as their standard bearer. Marcos claimed victory over Aquino despite reports of massive cheating, but he was removed from power a few hours after his oath-taking on February 25, 1986.