and john yang is on the phone from aurora and the facility where the fire broke out. me start with you. i see the people behind you. >> it's pandemonium here. it's interesting, tamron. the skies over chicago are probably the quietest they've ever been. but here on the ground it is absolute pandemonium. people are lined up in this terminal, the american airlines terminal. more than 300 flights have been cancelled. all told in chicago more than 850 flights have been cancelled already today. and while there is a very, very little bit of good news, that is both united and american have started taking off from here but only about ten flights from american have taken off here so far. the flights have to fly at the low old attitude until they leave the chicago area and can be picked up by air-traffic control in place the like minneapolis and fly on to their destination. we met a lot of people who are going to weddings and have family plans. all of these people are standing two, three, 400 people deep in a line trying to make alternate travel plans. there's a line to get out

nbc's john yang has more on what you should look for. >> sabrina began worrying about her son chris shortly after he turned 15. >> he would go from loving, like, i love you, mom, then he would, like, switch to this other child. >> no signs of alcohol and drug tests were negative. then she got a wake-up call. >> seeing a good friend of mine's son laying in a casket overdosing from heroin. all i could picture was planning my son's funeral. >> chris finally admitted using a synthetic drug known as cloud nine. >> because i was stealing from my parents to get money. i was getting really bad. i was getting really addicted. >> easy to buy from convenience stores, gas stations and smoke shops and almost impossible to regulate. users commonly put it in electronic cigarettes. >> take the lid off. put a couple drops. close it. when they push the button, it turns the liquid into a vapor. >> reporter: this is what it looks like. just the name on the label. no other writing. it's a clear liquid. there's no aroma other than a faint fruity smell. users say when they use it in an e-cigarette, there's no sme

. >> john yang, nbc knew, fraser, michigan. >>> coming up next, theçó 49ers trying to avoid lose threeharbaugh. how his running back build a the team out. >>> plus, it was a sunny sunday for the a's. find out how one athletic made his mom's birthday wish come true on the final game of the season. >>> oh, what a day for bay area sports. great results. >> very, very true with all the details right now. brodie brazil joining us from comcast sportsnet. >> the final sunday of september was very busy. in fact, play-off baseball getting sorted out in just a minute, but first it was football from today. remember the first official game at brand-new levi's stadium? it did not go as planned for the 49ers. and earlier this afternoon, game two did not necessarily start as planned either. the 49ers hosting the unbeaten eagles today in the south bay. second quarter, 49ers down 7-3. collin kaepernick will roll left. but then will throw right, all the way across the field to frank gore. he is wide open for the 55-yard touchdown. that's the longest of his career. in fact we had to speed it up for you a

john d. where yemeniki sr. vicki yancyshevin yang. michael david yarnell merna shaquill wilson kevin w.yokum edward p. york kevin patrick york ray mopped r. york suzanne martha yumas barington leroy young jr. donald arthur young edmond g. young jr. jacqueline young lisa l. young elkin yun joseph c.zarcoli adelle zakahare afada zalatizman robert allen zampira. >> mark zagarilli. christopher r.zagra jr. ira zazlow kenneth albert zellman martin morales zempola za zing mark scott zeppelin ji jo zo ugo zing michael joseph zinze charles allen zion julie lyn zippa salvador paul zoes joseph j.zarcolla andrew stephen zucker iglal zukelman. >> and my brother. i miss you. it's been a long 13 years. >> and my brother kevin joseph, i miss you baby brother. watch out for us all, especially baby nicholas. love you. >> peter branyan. >> thomas moore brennan. >> rodney diggens james domanico barbara mary habib philip hensler karen elizabeth pagarti stephen michael hagas richard b. hall christopher noble todd isaac dennis m. johnson robert a. lawrence

john lee. >> david s. lee. >> gary h. lee. >> hyun joon lee. >> juanita lee. >> katherine blare lee. w11 lin. >> lorraine mary lee. >> myung lee. >> richard y. lee. >> çstuart lee. >> yang lee. >> stephen paul lefkowitz. >> adrianna legro. >> edward joseph,elman. >> david r.leistman. >> joseph anthony lenihan. >> john joseph lennon jr. >> luis leon sr. >> matthew gerard leonard. >> michael lepore. >> charles alesperance. >>> jeff laveen. >> john denn levi. >> my cousin mark hindi. you're the the brother i never had. you had a naturally positive outlook on life i admired and try to imlate to this day. you enjoyed life so much that it makes your loss so much harder. it's still so devastating that it had to be you. 13 years ago i was about to turn 21. you were 28. we were entering the phase of our lives where we were becoming adults and friends. now that i'm about to start a family, i wish i could have seen you do the same. no matter how many years pass, i'll continue to honor your memory. i love you and miss you. >> my husband bernard. not a day goes by that you're not on our minds and in our hearts. we love you always. >> neil david levin. >> robert levine. >> robert lev

john lee. >> david s. lee. >> gary h. lee. >> hyun joon lee. >> juanita lee. >> katherine blare lee. w11 lin. >> lorraine mary lee. >> myung lee. >> richard y. lee. >> çstuart lee. >> yanger lee. >> stephen paul lefkowitz. >> adrianna legro. >> edward joseph,elman. >> david r.leistman. >> joseph anthony lenihan. >> john joseph lennon jr. >> luis leon sr. >> matthew gerard leonard. >> michael lepore. >> charles alesperance. >>> jeff laveen. >> john denn levi. >> my cousin mark hindi. you're the the brother i never had. you had a naturally positive outlook on life i admired and try to imlate to this day. you enjoyed life so much that it makes your loss so much harder. it's still so devastating that it had to be you. 13 years ago i was about to turn 21. you were 28. we were entering the phase of our lives where we were becoming adults and friends. now that i'm about to start a family, i wish i could have seen you do the same. no matter how many years pass, i'll continue to honor your memory. i love you and miss you. >> my husband bernard. not a day goes by that you're not on our minds and in our hearts. we love you always. >> neil david levin. >> robert levine. >> robert l

john lee david s. lee dong chu lee gary h. lee hyun-joon lee juanita lee kathryn blair lee linda c. lee lorraine mary green-lee myung-woo lee richard y.c. lee stuart lee yang lee stephen lefkowitz adriana legro edward joseph lehman eric lehrfeld david ralph leistman david prudencio lemagne joseph anthony lenihan john j. lennon jr. john robinson lenoir jorge luis leon matthew g. leonard michael lepore charles a.lesperance jeff leveen john d. levi alisha caren levin >> and my cousin, mark hindy. mark, you're the brother that i never had. you had a naturally positive outlook on life that i admired and that i try to emulate to this day. you enjoyed life so much that it makes your loss so much more harder. it's still so devastating that it had to be you. 13 years ago, i was about to turn 21 and you were 28. we were entering the phase of our lives where we were becoming adults and friends. now that i am engaged and soon to start a family, i only wish i could have seen you do the same. no matter how many years pass, i will continue to honor your memory. i love you and miss you. >> and my husband, bernard pertraniko. bernard, not a day goes by that you're not on o