The Metropolitan Opera is celebrating the opening of “Oppenheimer” by streaming a 2008 production of John Adams’s “Doctor Atomic” for free. The production, which will be available to audiences for free through July 28, stars bass-baritone Gerald Finley as Oppenheimer and mezzo-soprano Sasha Cooke as Kitty Oppenheimer. Alan Gilbert conducts the opera which also stars Richard Paul Fink and Thomas Glenn. The {…}