The United States has the technology to find other Earths in the Universe. While they wouldn't be called Earth, it is likely there are planets that have similar life like we do. It has already been established that there are planets with temperatures like that of Earth, so only lack of advancements in technology stop us from discovering them.
Yes, The U.S. should allowed to utilize technology to search for other Earth's in the Universe. A discovery may lead to more resource for our planet Earth. Our planet has already utilized many resource which are now scare. It is a great learning experience and can also prove to become very useful in the future.
Yes, the United States certainly has the technology to find other Earth like planets in the universe. There are more and more reports coming out these days about finding other planets that are capable of supporting life. The features a planet must have to support life are water and a certain type of atmosphere. While there haven't been any discoveries inside our own solar system of this nature, the US does have the ability to look outside our own solar system.
Yes, I do believe the United States has the technology to find other earths or life supporting worlds in the universe. It may be in development or it may be awaiting launch, but I do believe we have it. We already have telescopes that detect heat and atmospheric conditions on other worlds.
The United States does not have the technology to find other "Earths" in the Universe. We may have the technology to find other planets that happen to be similar to Earth, but we can't tell if they are really other "Venuses" or any other non-Earth-like planet. We have only just gotten to the point of seeing that other stars have planets. Learning about those planets atmospheres is a few decades away.