The malfeasors of Dusit D2 Nairobi; A Review of Grassroots Jihadists Poor Tradecraft. Harakat Shabaab Mujahidden (HSM), the Al-Qaeda branch in the horn of Africa banked on Mahir Khalid Riziki, a 25 year criminal from Mombasa’s dusty outskirt of Majengo, to make the Dusit D2 terror attack bear a complexion. Mahir, however, will remain the...