The Pentagon said on Wednesday that a Turkish proposed buffer zone was not one of the military options under consideration as a US-led coalition pursues airstrikes in Syria, but acknowledged it was a subject of discussions with Ankara. 'This is not a new issue,' Pentagon spokesman Rear Admiral John Kirby told a news conference, noting longstanding Turkish interest in a buffer zone. 'It is now not on the table as a military option that we're considering. That said, I think it's a topic of continued discussions.'