Complex sentence: In July 2010, he was arrested while boarding a plane to go to Somalia (via Uganda), on charges of aiding Al-Shabaab, which is aligned with al-Qaeda and has been designated a terrorist organization by the U.S. government.
Split into simpler sentences: In July 2010, he was arrested while boarding a plane to go to Somalia (via Uganda). He was charged with aiding Al-Shabaab, which is aligned with al-Qaeda and has been designated a terrorist organization by the U.S. government.