On 11 July 2010, al-Shabaab bombers killed 74 people in Kampala. On 13 September 2014, the Ugandan security and intelligence services, with the assistance of the United States, identified and foiled a major terrorist attack in Kampala. They recovered suicide vests, improvised explosive devices, and small arms, and they arrested 19 people who were suspected to have had links to al-Shabaab. This attack could have been as substantial as the attack in Nairobi during the previous year at Westgate Mall. Instead, it was a failure for al-Shabaab.