the more you know. >>> for more than four hours, katherine walton, her girls, and the kenyan woman helpingspace barely bigger than a bathtub. closed off from the outside world, katherine didn't know she was part of a terrorist attack. all she knew was that gunmen were canvassing the mall shooting at everyone. and now, a man with a gun was creeping toward her. >> you were under that table for hours. at some point, you hear something, you see something? >> i think there was a little bit of commotion and the kenyan woman said the cops are here. >> but it wasn't the police. it was a kenyan man, the businessman and father of four had received a text message from his brother earlier that morning. >> the message was very brief. it just read, at westgate terrorists. pray for me. >> reporter: abdul haji bolted to the mall and was stunned by what he saw when he got there. carnage everywhere. he was terrified for his brother who works for the kenyan intelligence service and had received death threats from al shabah, the same terror group now attacking the mall. >> at this point in time the magnitude

katherine walton crouched two three young daughters.amboa, she and two young children played dead all this time, they moved once and were instantly shot at. as a man approached them, faith held her position but he wasn't a terrorist. he was a police officer. >> baby, baby, touching my daughter, baby, baby. are you okay? are you okay? i said, wow. in my mind this must be a good person. not are we alive? are we okay? and then he said, it's safe. it's safe. it's the police. >> faith's 9-year-old daughter was the first to move. >> my daughter put up her head, hesitant and asked him, are you with the bad guys? because, i mean, i was looking down. i was scared. i thought they have come where we are. so my daughter put her head up and too late to tell her to go back down, engage the policeman in a conversation. are you with the bad people? mama, look up. >> and then, almost against the instincts, faith began to trust. >> when i looked up, i saw the civilian jacket. i didn't know who he was. not in a uniform. and then he as we sat up, i saw the