many who have visited molar city say they've saved thousands of dollars. >>> turningow vacation thaturned deadly for a retired couple from nebraska. they died after smoke filled their cabin. >> now because of a law passed nearly 100 years ago, the children are finding it all but impossible to hold the cruise line responsible. here's brian ross. >> reporter: the americans who boarded this amazon riverboat in south america were told it was a brand-new vessel built to exceed safety standards, and for the hammers of lincoln, nebraska, it was their ultimate adventure. >> they had worked for years and lived pretty grfrugally. >> reporter: sometime after midnight, something went terribly wrong no tin the hamme cabin. in minutes, the entire hallway is filled with smoke. the rosenbergs said there were no fire flashing lights. >> you couldn't see five inches in front of your face. >> reporter: again and again, crew members go to the hammers' cabin but don't try to go inside. it would be 20 minutes and 47 seconds from the first sign of smoke until the crew will enter the cabin to rescue the ham

it's been seeing so much dental trade that it's now been dubbed molar city. many americans who visit it say they've saved thousands of dollars. >>> and msnbc host and former congressman joe scarborough says he's leaving the republican party. scarborough was on stephen colbert's show last night with his co-host and fiancee mika brzezinski. >> they clashed with trump. scarborough says he's becoming an independent because so many republican lawmakers aren't standing up to the president. >>> when we come back, hundreds of skateboarders in a tense confrontation with police. we have new video coming in from san francisco. >>> and a break at the all-star game. so one player could actually get a picture with the ump. what? stay with us. i was active. then the chronic, widespread pain drained my energy. my doctor said moving more helps ease fibromyalgia pain. she also prescribed lyrica. fibromyalgia is thought to be the result of overactive nerves. lyrica is believed to calm these nerves. woman: for some, lyrica can significantly relieve fibromyalgia pain and improve

is keeping dentists in the mexican town so busy it is being dubbed molar city. >>> and the dream cruiseed their cabin and why a near 100-year old maritime law is making it impossible for their children to get justice. but first here's a look at the temperatures back here in the u.s. >>> "world news now" weather, brought to you by united health care. ♪ there's nothing more important than your health. so if you're on medicare or will be soon, you may want more than parts a and b here's why. medicare only covers about 80% of your part b medical expenses. the rest is up to you. you might want to consider an aarp medicare supplement insurance plan, insured by unitedhealthcare insurance company. like any medicare supplement insurance plan, these help pick up some of what medicare doesn't pay. and, these plans let you choose any doctor or hospital that accepts medicare patients. you could stay with the doctor or specialist you trust... or go with someone new. you're not stuck in a network... because there aren't any. so don't wait. call now to request your free decision guide and find the aarp