In the early hours of Monday morning, a suicide bomber drove his car filled with explosives into a crowded bus of government workers in the Afghan capital. The Taliban has claimed responsibility for the attack, which killed 35 and injured dozens of others. This bombing follows a string of violence within the past year in Kabul, with over 1,700 civilian casualties. NATO's combat mission ended 3 years ago, and Afghanistan's security forces have since suffered numerous casualties as the Taliban and the Islamic State threat grows stronger.