distracted driving. new cutting edge, hands-free technology designed to keep your hands on the wheel and attention on the road. who is pointing out the latest precautions? sensational psy, the south korean performer, the latest song, incredible performing and how he's is attracting so much attention on youtube. that's in "the skinny," on this wednesday, april 24th. >> announcer: from abc news, this is "world news now," with john muller and diana perez. good morning, everyone. we begin this half-hour with new details in the boston bombing investigation. dzhokhar tsarnaev is cooperating with police. admitting the plot was devised from the internet. >> tamerlan tsarnaev bought the explosives at a new hampshire fireworks store the same place that sold the time square terrorist his materials. with more here is our chief investigative correspondent brian ross. >> reporter: with injuries to his head, neck, legs and hands healing, the hospital upgraded the condition of dzhokhar tsarnaev from serious to fair. so far, the only word he has spoken is a grunted no. at the same time, friends sought to upgrade his image.