"Once we establish the facts, I have made clear that the use of chemical weapons is a game changer."—President Barack Obama on the U.S. investigation into charges that chemical weapons were used in Syria's civil war.

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"Since he was probably 8 years old he wanted to be a Marine. That's all he wanted to do."—Karen Perry on her 19-year-old son, Pfc. Josh Martino of Dubois, Pa., who was killed by mortar fire during a military training exercise in Nevada earlier this week.

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"You know the whole legend of St. Patrick, right? St. Patrick drove all the snakes out of Ireland—and then they came to the United States and became NBC executives."—"Tonight" host Jay Leno joked on Monday's show as speculation swirled that the network is taking steps to replace him with Jimmy Fallon next year and move the show from Burbank, Calif., to New York.