WASHINGTON—President Obama delivered a 10-minute-long inaudible and untelevised speech on gun control Thursday, addressing the politically volatile topic from behind the closed doors of the Oval Office, where nobody could see or hear him. "The Second Amendment doesn't…" said Obama, who trailed off and gently whispered a number of strong, definitive statements that were muffled by the hand in front of his face. "While I understand this is an important issue to many Americans, I also believe that in the aftermath of the tragedy in Arizona, certain kinds of guns are [incoherent mumble], and that we should seriously look at [incoherent mumble]. It's the right thing to do." White House sources confirmed that it was Obama's finest speech since his one-hour silent monologue last Friday, when he outlined the growing threat of climate change and ordered the oil and automobile industries to develop renewable energy sources while cutting carbon emissions completely by 2018.