Anyways, even if the Pentagon has contacted aliens (and I'm sure they haven't contacted aliens with a human-esque civilization or there'd be no way to conceal it, weird airy-fairy aliens maybe but that's the equivalent of talking to angels, djinn, or elves, and if you don't think there's a government conspiracy to conceal angels then airy-fairy aliens aren't going to be a conspiracy either, just a few people in the government who might talk to angels and a few people who might talk to airy-fairy aliens) there's no reason they'd make it public. The Pentagon doesn't even make all the activities of the Chinese and the Russians public, and interacting with space is way less relevant to most people's lives than that. If you want to know if humanity has contacted aliens, you're going to have to get up off your bum and look yourself, not just wait for the government to say "oh, there are aliens" when the government won't even tell you what the Chinese are doing.