The Westgate Mall attack which claimed the lives of tens of people shocked the conscience of the world.
It was carried out by militants pledging their allegiance to Somalia-based terrorist group Al-Shabaab.
Adnan Garar, a high-placed member of the group, is believed to have planned the deadly attack.
U.S intelligence services worked round the clock to ensure that justice was brought to him in 2013.
He was killed in a drone strike carried out by the U.S.
67 people are believed to have lost their lives in the deadly attack that attracted condemnation from across the world.
It happened just months after President Uhuru Kenyatta assumed the reins of power.
Kenya is enmeshed in a military effort in Somalia aimed at degrading the group and restoring a semblance of stability to the war-torn country.