the world watched in horror as the terrorist attack in nairobi's westgate mall unfolded.e still stuck inside with little communication to the outside. phillip walton was in the u.s. far from his home when he learned his wife and children were among those in the building. all he could do was wait and pray. here's kate snow. >> 3 hours had passed since phillip walton was awakened by a call telling him his family was trapped inside the westgate mall. pinned down by gunfire. he had been on his computer all morning checking for updates and then suddenly he received a facebook message from a friend with a freeze frame of video and there in the bottom right hand corner was an unmistakable sight, his two sons alive and outside of the mall. >> it was my two sons standing with my business partner. it was a very big, very noticeable man. >> paul weaver raced down to the mall area and confirmed the picture was real. the boys were out. >> and just seeing them, i mean, i don't think there's been any bigger hug in the world. it was joy, but seeing the anguish in their face and les, we j