I'm not really sure if it would be a good idea to just give the country or the world that kind of information. It very well could start mass hysteria within the people. So many people would freak out about aliens and abductions what would be the point?
There may very well be something out there but I believe too many people are too happy to live in oblivious bliss than to truly wonder. If the government were to break that bliss I do not believe some people would like it. Right now aliens are still completely science fiction to so many people. To ruin that observance of there's may not be in the best ideas of the country. Although candidate Barack Obama of the Presidential election does want to shine light on the government's secret doings. Whether this will be on aliens or just committees that are classified, there is someone else who agrees that the people should know.