katherine walton: just an opportunity to walk around, kill a couple hours. and i knew that we'd go home and have naps and everybody'd be happy. kate snow: the waltons chose to move to kenya two years earlier from texas. for katherine and phillip, it was like going home. they were both children of missionaries and grew up in countries in west africa. they met in boarding school in africa, married in the states, and started raising their family. at the time of the attack, blaise was 14 years old, ian 10, portia four, gigi two, and petra, the baby just 13 months old, was born in kenya. their morning at the mall unfolded just as any family's might. they had lunch together in the third floor food court. after lunch, the boys decided to race down to the first floor to a big department store, sort of like a super wal-mart, called nakumatt. mom and the three young girls were still finishing up lunch, so they lagged behind. as they were walking through the mall to catch up with the boys, with the baby in a sling and the two toddlers holding mom's hands, it happened--

katherine walton: it was just chaos. hello, i'm craig melvin, and this is "dateline."rs into prey. lots of screaming, lots of gunfire. they had a demeanor like they owned the place.