empty New York; nonetheless, 800,000 are killed in Manhattan alone. Eurasian documents completely vindicate Manning's unconstitutional policies; had the President waited for congressional approval, America would have lost the war. Manning becomes lifetime head of the new Peace Patrol, with a worldwide monopoly over the radioactive dust and the aircraft which can deliver it. He opens schools for the indoctrination of cadet patrolmen from any race, color, or nationality. They will patrol the sky and "guard the peace" of any country but their own, and would be forbidden to return to their original country for the entire duration of their service; "a deliberately expatriated band of Janizaries, with an obligation only to the Commission and the race, and welded together with a carefully nurtured esprit de corps." Manning does not have time to complete his original plans for the Patrol. In 1951, the President dies in a plane crash; his isolationist successor demands Manning's resignation and intends to dismantle the Patrol. As Manning argues with the President, planes loaded with radioactive dust and piloted by non-Americans appear overhead. Manning is willing to kill himself and treat the capital of the United States as he would treat any other place which he perceives a "threat to world peace". He wins the standoff and becomes the undisputed military dictator of the world. DeFries (himself dying from radiation poisoning) doubts that Manning, now the most-hated man on Earth, can succeed in making the Patrol self-perpetuating and trustworthy. There is no way of knowing how long Manning will live, given his weak heart. The narrator concludes: Themes Though it deals not with fission bombs, but rather with a radioisotope dust weapon, "Solution Unsatisfactory" accurately predicted many aspects of the development of nuclear arms and the dilemmas they pose, a year before President Roosevelt authorized the Manhattan Project led by General Leslie Groves. Scientific advisors wrote a 1943 memo to Groves entitled "Use of Radioactive Materials as a Military Weapon": While not part of Heinlein's Future History, the story also marks the first appearance of a "Patrol" in Heinlein's works. The concept of a distinct order of pilots totally dedicated to preserving the peace reappears in Heinlein's later works, including the short story "The Long Watch". The juvenile Space Cadet describes the training and indoctrination of Patrol cadets. Cadets are taught not to ask about another's country or planet of origin, and to admire and