France says it has proof that the Syrian government was behind the deadly chemical attack in Syria this month that left 89 people dead. French Foreign Minister Jean-Marc Ayrault confirmed that samples of the gas from the attack in the rebel-held town Khan Sheikhoun matched those of a previous incident. French laboratories kept samples from previous chemical attacks in Syria and compared the two. UK scientists previously confirmed that sarin, or a similar poison, was used in the attack after obtaining samples from the site.