Fallen Angels
Larry Niven
 Astronauts from the orbital society flew a modified scramjet, redesigned to harvest nitrogen from the Earth's atmosphere. Government policy declares that these ships are responsible for the ice age, so the scramjet is shot down with a surface-to-air missile. The pilot and copilot, an Earth-born American named Alex MacLeod and a space-born Russo-American named Gordon Tanner, are forced to crash land in Canada atop the glaciers. Upon hearing of this, the fan underground embarks on a rescue mission - a group of fans rides north through the Dakotas to rescue them before they can be apprehended by the Government. Upon reaching the Dakotas, the fans must travel largely on foot, as their van is unable to traverse the glaciers. However, they have a major advantage over their foes in the government - their relationship with the space station provides them with superior navigational abilities; following the fall of scientific society, the United States Air Force (USAF) no longer enjoys access to satellite reconnaissance. The fans are able to reach the downed spacecraft well in advance of the USAF. Their escape is aided in a similar manner. Though the Angels are unable to walk due to their overexposure to weightlessness and must be dragged along on sleds, the microwave power transmission beam reserved for Winnipeg is diverted to warm the travellers as they return south to their van. In addition, a tribe of nomadic Inuit peoples shares supplies with them in thanks for the warmth provided by the microwave beam. Upon finally reaching their van, the rescuers flee to a small science fiction convention of some 50 fans at a mansion owned by one of their own. Once there, one of the fans takes on the role of personal trainer to teach the Angels methods to adjust to Earth's gravity including various asanas from yoga. At the con, the fans brainstorm a daring plan - before the Greens had come to power, one of the Board of Trustees for the Metropolitan Museum of Boston by the name of Ron Cole supposedly refurbished a Titan II rocket. This rocket still exists at the Museum of Science and Industry at Chicago. The fans and the Angels leave for Chicago just moments before the mansion is raided by the Green police. The trip to Chicago gives the reader a brutal depiction of American life without basic technology. A blizzard forces the fans to take shelter in a farm town - where at least one towns-person dies in each blizzard for lack of heating oil. After hitching a ride in a consignment of cheese,the fans are captured by the feudal inhabitants of Milwaukee who are burning the excess houses in the city for heat. One of their captors has the food swapped with moonshine liquor and forces the group into slavery to pay off a series of trumped-up "fines". They are assisted by a fellow fan amongst their captors, and are able to continue on to Chicago. When the fans finally meet Ron Cole, their hopes are crushed. The rocket is a decaying wreck, and Cole is a shadow of his former self due to invasive 'reeducation' treatments. However, Cole is able to put them on another path - a privately constructed single-stage-to-orbit spacecraft at Edwards Air Force Base, disguised by the simple and effective method of its designer, Gary Hudson, declaring it non-functional.