here's kate snow with the conclusion of our story. >> for more than four hours catherine walton, her d the kenyan woman helping them huddled in a hiding space barely bigger than a bathtub, closed off from the outside world, ca h catherine didn't know she was part of a terrorist attack. 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. >> abdul 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 the same terror group that was now attacking the mall. >> the magnitude of the whole situation dawned on me. >> security forces were