Bill Clinton already had acted on Area 51 with a Presidential Order prohibiting environmental examination regarding hazardous wastes based on National Security Interests in a Federal Lawsuit.

Hillary will do the same; her promise to the tin-foil hat group was just to pick up a few more votes.  

His September 29, 1995 "Presidential Determination"  can be found at:  

http://www.ufomind.com/area51/desertrat/1995/dr31/exemption.html