>> he is knocking on the door help, help, fire, fire. >> the amazing rescues and the 8-year-old boy who was a lifesaver. it is friday, september 27th. >> announcer: from abc news, this is "world news now" with john muller and diana perez. >> good friday morning, everybody. we begin with the international search for a terror mastermind. the so-called white widow, samantha lewthwaite. >> there are new questions whether she played a role in the attack on the mall in kenya. here's our chief correspondent investigator brian ross. >> reporter: this one-time british schoolgirl, samantha lewthwaite, is being called one of the most wanted and dangerous women in the world. >> samantha lewthwaite has been a wanted person for a number of years now. >> reporter: worldwide interpol alert for samantha lewthwaite comes as authorities in kenya seek to find out if she was involved in the brutal attack on