UPDATE 12/08/22: The GBSD Test Program and Weapon system was officially renamed Sentinel after production of the EA/OEA and DEP.

This is the website for the Sentinel Test Program Environmental Assessment/Overseas Environmental Assessment (EA/OEA). The final documents pertaining to the Sentinel Test Program EA/OEA can be found in the Documents section.

POINT OF CONTACT: The point of contact for questions, issues, and information relevant to the Sentinel [GBSD Test EA/OEA] is Mr. Robert N. Knight, AFNWC/NXDX, 7840 Alabama Drive, Bldg. 2728, Hill AFB, Utah 84056. Mr. Knight can also be reached by calling (801) 360-3516, or by e-mail at