The latest American drone strike in Iraq, which killed the commander of a powerful Iranian-backed militia group, is one more dangerous escalation in the increasingly unpredictable Middle East conflict. The US strike in the Iraqi capital Baghdad targeted Wisam ‘Abu Baqer’ al-Saadi – a senior leader of Kataib Hezbollah, which the Pentagon blames for the attack that led to the deaths of three American soldiers in Jordan last month.