FRONTLINE investigates the Assad regime's arrest, torture, and execution of detainees during the Syrian war. Former prisoners, guards, soldiers, and intelligence officials shed new light on atrocities carried out during Bashar al-Assad's reign.

FRONTLINE goes inside the high-stakes showdown between President Donald Trump and the courts over presidential power. Trump allies, opponents and experts talk about how he is testing the extent of his power; the legal pushback; and the impact on the rule of law.