First quarter 1960. (Cancelled flight). Program: Mercury. In the January 1959 Mercury program plan, flights of the capsule on a Jupiter IRBM were to take place in addition to flights atop the Redstone and Atlas boosters. The second Mercury-Jupiter flight was planned as a maximum dynamic pressure test to qualify a production Mercury capsule with a chimpanzee aboard. A human astronaut was considered briefly before the Mercury-Jupiter flights were cancelled in July 1959 on cost grounds.

• - First quarter 1960 - Mercury-Jupiter 2 (MJ-2) (cancelled) 

  In the January 1959 Mercury program plan, flights of the capsule on a Jupiter IRBM were to take place in addition to flights atop the Redstone and Atlas boosters. The Mercury-Jupiter flights were cancelled in July 1959 on cost grounds.

• Khrushchev, Sergei, Nikita Khrushchev and the Creation of a Superpower, Pennsylvania State University, 2000. ISBN: 0-271-01927-1. The English-language version of the memoirs of Khrushchev's son. A unique view of decision making in regard to the space and rocketry programmes at the highest level. More at amazon.com...