In August 2013, the government was suspected of using chemical weapons against its civilians. US Secretary of State John Kerry said it was "undeniable" that chemical weapons had been used in the country and that President Bashar al-Assad's forces had committed a "moral obscenity" against his own people. "Make no mistake," Kerry said. "President Obama believes there must be accountability for those who would use the world's most heinous weapon against the world's most vulnerable people. Nothing today is more serious, and nothing is receiving more serious scrutiny".