good wednesday morning. i m erica hill. and i m jim scuitto. perhaps some relief. the first flights taking off moments ago from reagan national airport here in d.c., this after the faa lifted the earl why are ground stop. now restarting all u.s. takeoffs, but the logistical nightmare continues as airports across the country try to get their flights back on schedule. they re still mounting. it all started early morning after a key faa system went down, halting all u.s. flight departures. and that spreads around the world. in london, passengers said they were stuck on the tarmac for hours waiting to be taken off. president biden has been briefed, and they re work ing - and we ll respond at that time. pete muntean is at reagan airport, and athena jones, and emeril walker there in atlanta. this is a vote good sign now that flights are taking off. a very good sign. things were at a standstill. that s when the faa alleviated this ground stop they had in place for a coup
helping people in marginalized communities is the only reason i m doing this. it s my entire mission. reporter: there is some research that suggests the positive sides of tiktok. according to pew research, they say one in eight teens report feeling more connected to community. 9 and they find a sense of create activity, and tiktok told us they do have screen management tools, where you can set limits. they re also testing a sleep feature that will tell you when it s time to shut down and go to bed. but, of course, what we re hearing from teens, they feel like tiktok knows them so well. they know what they said to consume. there s the for you section that pumps in tons of content. yes, it s on the company, but it s also on us to to reg to regulate or consumption. at the end of the day, so many people say they are addicted to social media. that can easily happen. and you can understand the