NATIONAL HARBOR, Md. (AP) — American troops need to prepare for combat not only in Earth’s orbit but around the moon, President Donald Trump’s top military adviser said Wednesday, looking ahead to a new frontier in warfare after the U.S. revealed for the first time that it has deployed weapons in space.Gen. Dan Caine, chairman of the Joint Chiefs of Staff, told service members and industry figures at the Air, Space and Cyber Conference outside Washington that the U.S. military should adapt now so it “is prepared to fight, endure and win … from the seabed to cislunar space.”Space Force,…