How the Percival Lowell Observatory on Mars Hills in Flagstaff, Arizona, funded by NASA and Lockheed-Martin, betrayed the vision of Percival Lowell. Extensive excerpts of Lowell's 1897 and 1908 bestsellers about Martian Canals built by peaceful, intelligent Beings, this book exposes the truth in detail that most of the Lowell Observatory's budget comes from being a part of the network of secretive weapons research, for the U.S. Dept. of Defense. Lowell was a staunch anti-war Republican, and died in 1916, when he told the author's grandfather Dave O'Brien, also a resident of the little Arizona mountain town near the Grand Canyon, that he was "heartbroken, when The Great War broke out." The author's mother was born in Flagstaff in 1924 and told stories about her father being a neighbor of "Percy Lowell", and their conversations about an enlightened future for the town and the country. With hundreds of documents and photographs, 'Invaders from Mars Hill' is a no-holds-barred analysis of the contradictions in scientific and academic projects that are receiving funding from Aerospace Defense Contractors like Lockheed-Martin, which builds not only NASA's rockets and satellites but also the Intercontinental Ballistic Missiles {ICBMs} with multi-kiloton nuclear warheads, by the thousands; and which is actively pursuing a new governmental policy of a militarization of the Moon and Mars.