Buzz Aldrin propellants, with an expected five and a half month journey from the Earth to Mars, and a return trip to Earth of about the same duration on a twin-cycler. Aldrin continues to research this concept with engineers from Purdue University. In December 2003, Aldrin published an opinion piece in "The New York Times" criticizing NASA's objectives. In it, he voiced concern about NASA's development of a spacecraft "limited to transporting four astronauts at a time with little or no cargo carrying capability" and declared the goal of sending astronauts back to the Moon was "more like reaching for past glory
Buzz Aldrin in their honor in New York, Chicago, and Los Angeles. An official state dinner that evening in Los Angeles celebrated the flight. President Richard Nixon honored each of them with a presentation of the Presidential Medal of Freedom. This was the beginning of a 45-day "Giant Leap" tour that brought the astronauts to 25 foreign countries and included visits with prominent leaders such as Queen Elizabeth II of the United Kingdom. On September 16, 1969, the astronauts addressed a joint session of Congress. With the Apollo Program coming to an end, Aldrin saw few prospects at NASA, and decided to