The program was marred by various concerns, notably the safety of Mir following a fire and a collision, financial issues with the cash-strapped Russian Space Program and worries from astronauts about the attitudes of the program administrators.
Programmet var dog forfulgt af mange bekymringer, især angående sikkerheden om bord på Mir efter en brand og en kollision om bord på stationen, finansielle problemer i den russiske rumfartsorganisation og bekymringer fra astronauterne om programmets administratorers attitude.