In 1994 there was a court case where some workers who were poisoned working at Groom Lake sued the gov't. [1]<p>Apparently at one point a government lawyer, in using the state secrets privilege to deny examination of relevant witnesses referred to "The alleged facility, if it indeed exists", at which point the opposing council offered to load up his car and drive everyone to the damn base =).<p>[1] <a href="https://en.wikipedia.org/wiki/Area_51#Environmental_lawsuit" rel="nofollow">https://en.wikipedia.org/wiki/Area_51#Environmental_lawsuit</a>