It’s the moment that those who are spending summer in the city have been waiting for: Screen on the Green! Even underage interns can come out for the cinematastic fun. Now in its seventh year of converting the National Mall into an outdoor movie theatre, this year’s line-up proves to be just as entertaining as the one from last year. Monday, July 17: The Day the Earth Stood Still (1951) Plagued by fear and apathy,…