CCTV footage from inside Nairobi's Westgate mall shows the al-Shabaab attackers as they went on a killing spree. The people, armed with AK-47s and grenades, killed at least 67 people who were at the shopping centre. Kenya's military have named four suspects as Aby Baara al-Sudani, Omar Nabhan, Khattab al-Kene and Umayr
A detailed investigation by Daniel Howden reveals how incompetence and infighting among the authorities left attackers free to continue slaughter for 80 hours