What are historical events that happened at the Lincoln Memorial?

ok, so i have a paper due and i need three historical events that are significant and that happened at the Lincoln Memorial. I have 2 but i need another one. i have the opera singer, Marian Anderson and the "I have a dream" speech by martin luther king.|||The first time the AIDS quilt was displayed on the Mall in DC, the names were read from the steps of the Lincoln Memorial.