Is cornered and frightened Assad considering using chemical arsenal against his Syrian people?

US President Barack Obama has given Syria’s regime a stark warning that any use of chemical weapons would be a “tragic mistake” for which“there will be consequences and you will be held accountable”. What has triggered the latest expressions of US concern?

Obama threatens to use force against Syria

US President Obama warned Syria on Monday that it would face American military intervention if there were signs that its arsenal of unconventional weapons was being moved or prepared for use. It was Mr. Obama’s first direct threat of force against Syria, as he has resisted being drawn into