The government should let the American people know if they have Alien Technology or not. This will solve much of the confusion and wonder on whether or not alien activity exists. There is much uncertainty about Area 51 and what we have discovered about life forms in other places outside of earth.
If the government had alien technology, it is probably doing the right thing by sitting on it. Humanity is an egotistical race, and we are likely lacking the proper emotional intelligence to accept that we are likely an inferior species in terms of our knowledge base. Still, the day may well come when they can disclose publically.