Fourth of July activities in Washington will begin with the National Indepence Day parade at noon, along Constitution Avenue from Seventh to 17th streets. From 4 p.m. to 9:20 p.m. the Sylvan Theatre will offer entertainment by Lou Rawls, the international musical road show "Up With People," the Navy Concert Band, a dance troupe from Hersheypark, Pa., and the trio Riders in the Sky. The National Symphony Orchestra will perform at 8 p.m. on the west lawn of the Capitol with guests Tony Bennett, Cab Calloway, Diahann Carroll and Joel Grey. Bill Cosby will appear via video screen. The day will conclude with fireworks on the Mall at 9:20 p.m. Call (202) 619-7222.