The FBI and US intelligence authorities are investigating whether any Americans are part of the Shabaab assault team that attacked a Nairobi mall. US citizen Abdel Hameed Shehadeh, 23, was sentenced to 13 years in prison for lying to the FBI about his attempts to join the Taliban or al Qaeda. He was an acquaintance of Adis Medunjanin, who along with several others was guilty of plotting to bomb New York subways.
