Take the XAP quiz

Play the XAP tetroon game

See the Certificate of Appreciation

This is the temporary home page for the eXtreme Altitude Project, or "XAP" for short. The bold mission of the XAP is to send a manned cluster of helium balloons to the outer periphery of the Earth's atmosphere.

The link you clicked on is not ready yet. All the pages will be completed before the site is officially launched.

--Tom Deering, Team XAP Director of Communications

• Jump to XAP Front Page.