The airways21.challenge.gbx file you have requested: Tracks / Airways 2 - 2.77kb is not available. Perhaps try browsing all files for the game TrackMania Nations Forever and upload any files you want to share or are missing. This is the only information we could locate:
The second part of the track Airways. Dont be fooled by the fact that it looks small. This took me a full 1.52min to get through (and a few failures :) ).