Complex sentence: Both ASA and GAP were unable to make any commitment towards the cross-border passenger terminal, which was then withdrawn from the Presidential summit's agenda and in July 2002, support for the project was withdrawn by Mexico.
Split into simpler sentences: Both ASA and GAP were unable to make any commitment towards the cross-border passenger terminal, which was then withdrawn from the Presidential summit's agenda. In July 2002, Mexico's border support for the project was withdrawn by Mexico.