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. >> ashley justie told us simply last night was hell.e will be back from las vegas in a moment. >>> back in las vegas. up on the 32nd floor, a gunman opened fire last night. killing 59 people and wounding more than 500 others. it's been 68 weeks since what had been the deadliest shooting in modern u.s. history, the pulse nightclub attack in orlando that left 49 dead last year. now, our hearts ache again, for the neighbors we lost in las vegas. flags in washington, and across the nation, were lowered to half-staff today on orders from the president. for a mourning period that will last until sunset this friday. foreign embassies lowered their flags as well. with leaders from the pope to the queen of england offering condolences. and that's the "overnight news" for this tuesday. for some of you, our coverage of the massacre in las vegas continues. for others check back a little later for the morning news, and cbs this morning. from the las vegas strip, i'm anthony mason. thank you for watching. [ gunfire ] >> the shots from mandalay bay. >