The attack on the Westgate shopping mall was one of the worst terrorist attacks the country has ever experienced. Yet in the midst of the anguish and sorrow, heroes emerged, among them police officers who risked their lives to save those of civilians stranded inside the mall. Meet Adan Iya, Steven Lelei, Tawfiq Baya and Benjamin Chemjor, the police officer who was seen in pictures carrying a baby out of the building.