>> dubois: howard nathan in denver. thank you. today in north dakota federal investigators say they have found no track or signal problems at the scene of a derailment and fire out side of casselton on mochbd a freight train came off the tracks and the hit another one hauling crude oil. 18 cars fought fire. some exploded but nothing was hurt. trains are expected to start rolling again tomorrow. a chinese helicopter was cleared today to begin airlifting passengers from a research vessel trapped in the ice surrounding antarctica. the ship's been frozen in place since christmas eve. about 1700 miles south of new zealand. holly williams is in london following late developments for us tonight. hallly. >> reporter: maurice, we've been on a conference call with the australian authorities who are coordinating the rescue. they're expecting it to begin very soon and say it could take myt five hours to a full day. >> having a wonderful time. you can see we have this wonderful snowy wonderland. >> reporter: for more than a week now, expeditio

howard nathan of our affiliate kcnc reports. >> reporter: by noon there was a three-hour wait to getside this store to buy marijuana. one of the first customers was an iraq war veteran who says he needs it for post combat stress. >> i couldn't be happier. it's a huge stepping stone for other states as well. >> reporter: shaun had to spend $375 to buy chock marijuana truffles and an eighth of an ounce called bubba kush. how long is that eighth going last you? >> we'll see. it might go in a frame on the wall somewhere. >> reporter: this denver resident said he looked forward to buying and enjoying marijuana without fear of being placed under arrest. >> i've been in trouble before because marijuana was illegal, so it's kind of a big deal for me. >> reporter: there are limits on the sale of marijuana. buyers must be 21 or older. it can't be smoked in public places. colorado residents can purchase up to an ounce. nonresidents are limited to a quarter ounce and can't take it out of state. organizers of colorado's campaign to legalize marijuana expect almost $400 million in sales this year

howard nathan for cbs news, denver. >> colorado residents are allowed to buy an ounce of marijuana at a time. out of state visitors can buy a quarter ounce but it is illegal to leave the state with it. >>> change in the game when it comes to buying a car. no more haggling with the dealer. the new trend to give you the best price. >> the competition was tough but we have a winner for the first baby of 2014 all thanks to a last-minute change of plans. ,,,, female announcer: female announcer: it's time to make room for the new mattress models during sleep train's huge year end clearance sale. get beautyrest, posturepedic, even tempur-pedic mattress sets, at low clearance prices. save even more on floor samples, demonstrators and closeout inventory. plus, free same-day delivery, set up and removal of your old set. why wait for the new models? sleep train's year end clearance sale is on now. superior service, best selection, lowest price, guaranteed! ♪ your ticket to a better night's sleep ♪ provision in the affordablee act. it required religious- affiliated groups to provi >>> the supreme

nathan howard showstous lines were out the door. >> reporter: by noon, there was a three-hour wait to get inside the denver store to buy marijuana. one of the first customers was an iraq war veteran who needs it for post combat stress. >> it's a huge steppingstone for other stets as well. >> reporter: sean bought marijuana infused chocolate truffles and bud called bubba cush. >> how long will that last you? >> i don't know. it might just go on in a frame. >> reporter: this denver resident said he looked fortoward to buying and enjoying marijuana without fear of arrest. >> i have been in a lot of trouble before, so this is a big deal for me. >> reporter: there are limits on the sale of marijuana. buyers must be 21 or other. residents can get up to an ounce, but nonresidents are limited to a quarter ounce. organizers of colorado's campaign to legalize it expect almost a million dollars in sales this year saying it will create jobs, reduce crime, and create tax revenue. >> all that money goes into the hands of the cartels. well that stops today. >> reporter: this one store estimates they

howard nathan for cbs news, denver. >> colorado residents are allowed to buy an ounce of marijuana at. out of state visitors can buy a quarter ounce but it is illegal to leave the state with it. >>> the supreme court has temporarily blocked a birth control mandate in the affordable care act. it requires religious affiliated groups to provide birth control for their employees. supreme court justice sonia sotomayor issued the block exempting two catholic nonprofits from having to provide birth control coverage. otherwise they could have faced thousands in fines. >> they are saying the affordable care act infringes on religious liberty by forcing them to buy birth control that conflicts with religion. >> having access to contraception is a fundamental health issue for individual women. >> justice sotomayor gave the justice department until friday to respond. >>> multiple people are hospitalized after a massive building explosion and fire at a minneapolis apartment building. flames and smoke poured from three-story structure. some of the 13 victims have severe burns. others were hurt jump

nathan howard shows us that the lines were out the door and down the block. >> by noon, there was a three-hour wait to get inside this denver store to buy marijuana. one of the first kus mers was an iraq war veteran who says he needs it for post-combat stress. >> i couldn't be happier. it's a huge steppingstone for other stats, as well. >> and eighth of an ounce of marijuana called bubba curb. deafen ver residents said he looked forward to buying and enjoying marijuana without fear of arrests. >> i've been in a lot of trouble before because it was illegal, and it was kind of a big deal. >> but there are limits on the sale of marijuana. buyers must be 21 or older. it can't be smoked in public places. colorado residents can purchase up to an auns per store but nonresidents are limited to a quarter ounce and can't take it out of state. organizers of colorado's campaign to legalize marijuana expect almost $400 million in sales this year and say it will create jobs, tax revenue and reduce crime. brian is an advocate. >> sales taking place in that country for decades. all that money goes into the ha