Soyuz TMA-10 was a human spaceflight mission using a Soyuz-TMA spacecraft to transport personnel to and from the International Space Station (ISS).

Spaceflight participant Charles Simonyi returned to Earth aboard Soyuz TMA-9 on April 21, following eleven days of ISS handover operations.

[2] The trajectory was reported by the crew as soon as they came out of the communications blackout caused by plasma surrounding the spacecraft.

[4] A ballistic trajectory entry had happened previously, with the Soyuz TMA-1 mission that returned Expedition 6.

This infuriated NASA (the Commission of Inquiry had lied to them)[citation needed] and this led to further investigation as well as special EVA activity on the ISS to check the docked Soyuz TMA-12 and its explosive bolts in their connection struts.