So holds today’s D.C. Circuit decision in Oberwetter v. Hilliard, concluding that (1) the Jefferson Memorial is a “nonpublic forum” in which reasonable, viewpoint-neutral restrictions are permissible, and that (2) the government could therefore bar from people from engaging, inside the Memorial, in picketing, speechmaking, marching, holding vigils or religious services and all other like forms of conduct which involve the communication or expression of views or grievances, engaged in by one or more persons, the conduct of which has the effect, intent or propensity to draw a crowd or onlookers.