|Apollo Twelve's 2002 return to Earth orbit.|
- Ramsey, James W. "The Space Shuttle, Modernized". Avionics Today, 1999, https://www.aviationtoday.com/1999/11/01/the-space-shuttle-modernized/. Accessed 20 Dec 2018
- On 11 October 1984, the US defence secretary reported to the president that equipment on the Challenger shuttle broke down and crew felt unwell when it passed over Lake Balkhash, near Norak, suggesting that the Soviets were testing a new anti-satellite weapon. Indeed, the Terra-3 experimental laser radar was used on Defence Minister Dmitriy Ustinov's orders. After a US protest, the Soviets promised not to use it against manned spacecraft. The Americans, however, were worried, thinking that Okno was a beam anti- satellite weapon system. This nearly wrecked the Soviet-US summit in 1985, which only went ahead after Soviet specialists proved that Okno had no radiating elements.