Analysis: Crossing Obama’s "red line" on Syria will require concrete proof

By using Matt Spetalnick and David Alexander WASHINGTON/RIYADH (Reuters) – While President Barack Obama has declared a "purple line" over Syrian use of chemical weapons, U.S. officers instructed on Tuesday that Washington was once not likely to respond without clear-lower proof of such use – evidence that could be very exhausting to come by using. Israel's high military intelligence analyst stated in Tel Aviv on Tuesday that Syrian executive forces had used chemical weapons – almost certainly the nerve fuel sarin – of their fight towards rebels looking to drive out President Bashar al-Assad. …