FILE – This combination of undated file photos shows, from left: Mohamud Said Omar, Abdifatah Yusuf Isse and Salah Osman Ahmed. Ahmed and Isse, who are among more than 20 young men who left Minnesota since 2007 to join al-Shabab, are expected to testify against Omar who is accused of helping to send fighters and money to the al-Qaida linked group in Somalia. Omar faces five terror-related charges in a federal a trial in Minneapolis. (AP File Photos)