welcome to the party. >>> armed men stormed into the westgate mall in kenya firing round after fatalee walton was hunkered down, crouched in a small kiosk with a stranger and her three young daughters. she was desperatery worried about her sons who were somewhere out there, but she had to focus on keeping her daughters quiet so they wouldn't attract attention. >> are you hiding from these gunmen? >> yeah. we were laying down on the ground trying to hide from them so they couldn't see us. porsche kept her fingers in her ears. she said she wanted her brothers. and i told her that we'd see them later. >> catherine could only hope that was true. half a world away, a phone rang in a hotel in north carolina. catherine's husband, phillip, had gone back to the u.s. before business meetings, leaving his wife alone in nairobi with their five kids. >> i got woken up at about 5:00 wpm with a phone call from hur dear family friend, so i knew it was not good. >> do you remember what he said? >> there is an attack going on at westgate and your wife and sons are in there and they're separated. that's

designated terror g group, based in somala, was responsible for the september 2013 attack on the westgate mallin nairobi that killed 67 people, and for the death of over 140 in the april 2015 attack on kenya's garissa university. nir kalron investigated the links between al shabaab and illicit ivory trade in 2012. kalron: al shabaab was controlling the ports of kismayo, marca, and big parts of mogadishu, including access to the port through its agents. evidenence from kenynya suggests the local and regional poachers used that access. we'd seen evidence from ports in marca and kismayo of ivory, large stocks of it, and had collected evidence from individuals that testified to having profifited from thahat te withth al shabaab b agents. knights: al shshabaab did contrl various ports in somalia where the ivory is being shipped out of, and they would basicallyly charge a tax for anything being shipped out. narrrrator: al shabaab levies a% to 7 7% tax on i ivory that t ps ththrough areas they control, mamaking aboutut $250,000 0 a yr from i ivory. ininsurgent groups and armeded forces units are not