The United States announces it is offering a reward of up to $10 million for a man described as the "terror mastermind" of a bloody hotel attack in Nairobi four years ago. "Mohamoud Abdi Aden, an Al-Shabaab leader, was part of the cell that the planned the DusitD2 hotel attack" says the US ambassador to Kenya, Meg Whitman. The Al-Qaeda affiliated group claimed responsibility for the January 15, 2019 siege on the upmarket DusitD2 hotel compound that lasted almost 20 hours. At least 21 people died, including a US citizen. IMAGES AND SOUNDBITES