. >>> and number five, it's never been seen by human eyes, but thanks to nasa radar imaging, a mega canyon has been discovered in greenland. this stretches, if you can believe it, for 460 miles. 200 miles longer than the grand canyon. researchers think that it's been hidden under a mile of ice for 4 million years. >>> president obama and his national security team will make the case for a strike on syria to senators from both parties today. we've seen some of the top members of the administration walk into the white house this morning already, but many lawmakers say he needs to do more. almost a third of congress has sent the president a letter calling for a full debate. an nbc news poll finds 79% of those surveyed say the president, excuse me, needs congressional approval before any military action. now, let's look at both sides of this. new york congressman eliot angel is the ranking democrat on the house foreign affairs committee. congressman scott rigell is a

scientists at the university of bristol say this mega canyon was hidden under a massive sheet of ice.ong, almost 200 miles longer than the grand canyon here in the u.s. the mega canyon is not nearly as deep. researchers think it's been hidden for 4 million years. >>> next on "new day," miley cyrus' day. you know, billy ray, he is speaking out about her performance at the vmas. what he had to say, after this. [ female announcer ] a classic macaroni & cheese from stouffer's starts with freshly-made pasta, and 100% real cheddar cheese. but what makes stouffer's mac n' cheese best of all. that moment you enjoy it at home. stouffer's. made with care for you or your family. ...and a great deal. . grrrr ahhh let's leave the deals to hotels.com. oh my gosh this is so cool... awesome! perfect! save up to 30% plus an extra 12% off with coupon... now until labor day. only at hotels.com you feel...squeezed. congested. beat down. crushed. as if the weight of the world is resting on your face. but sudafed gives you maximum strength sinus pressure and pain relief. so you feel free. liberated. releas

. >>> with help from nasa radar imaging, scientists have discovered a mega canyon in greenland.lmost 200 miles longer than the grand canyon. but it is not as deep. scientists say it has been hidden under a sheet of ice and has probably been there for 4 million years. >>> well, the school year's just beginning, but some classes have already been canceled because of weather. some colorado districts sent students home yesterday because temperatures hit a record 97 degrees, and officials say they didn't have any choice but to cancel classes because at least 88 schools in the denver area don't have air conditioning. parents seem to be taking those closures in stride, saying, look, if school has 'to be canceled for snow it, can also be canceled for hot weather. >>> this morning, investigators are trying to determine why a house in east los angeles suddenly collapsed. neighbors say they heard a strange noise, then watched in shock, as the house crumbled last night. search and rescue dogs were brought in, but they did not find anyone inside. police say the house had been abandoned for s