4/4: Kenya terrorists promise university attack just the beginning; Lost phone leads to whirlwind adventure

At least 148 people were killed when terror group Al-Shabaab attacked Garissa University College. Debora Patta reports from Nairobi with the tales of survival from some who managed to survive the attack; Losing a cell phone is usually an inconvenience. But for Matt Stopera, losing his phone meant taking an around-the-world journey to China. Seth Doane reports.