SpaceX had reset the countdown clock for its next human spaceflight, but a NASA decision has forced another delay of the private Axiom Space Ax-4 mission to the International Space Station.

Here is a timeline of all the delays that have stalled the Axiom-4 mission so far, and the reasons behind each one.

The Axiom-4 mission, which was scheduled to carry Indian astronaut Shubhanshu Shukla and three others to the International Space Station on Tuesday, was put off again to fix a leak in the SpaceX's Falcon-9 rocket.