When former President George W. Bush appeared on Jimmy Kimmel Live" on Thursday, to promote his book, "Portraits of Courage," Kimmel didn't waste any time trying to get Bush to admit that he may have looked for and seen alleged secret government files on UFOs. Kimmel began ... by asking Bush "a question that's very important to me and very important to the country. When you were in office, did you go through the secret files ― the UFO documents, because if I was president, that would be the first thing I did." Even before Kimmel finished asking the question, Bush immediately replied, "Maybe." Then, he told Kimmel, "You know, it's funny. My daughters asked the very same question." When Kimmel asked if Bush would be allowed to tell his daughters what was in those files, the former commander-in-chief said "No." This was hardly the first time that Kimmel has gone digging for UFO-alien revelations. In 2014, President Bill Clinton told Kimmel that ... he tried unsuccessfully to investigate what the government was hiding regarding UFOs. When Kimmel asked if he would have told the public had he found evidence of real aliens, Clinton smiled and said "Yeah." Then, in 2015, during a visit to Kimmel's talk show, President Barack Obama ― in tongue-in-cheek fashion ― said "the aliens won't let [disclosure] happen. You'd reveal all their secrets, and they exercise strict control over us. I can't reveal anything." In the latest interview ... the former president never actually suggested there were no UFO files to be unearthed.