Weapons fire cracks through the air of this Syrian border town.<br/> <br />President Bashar al-Assad's forces are bombarding Ras al-Ain with helicopters and artillery fire, as rebels fight to hold the town they claimed last week.<br/> <br />This Turkish resident says the violence has spilled over the border, forcing some to send their families away.<br/> <br />International powers have so far shied away from intervention in the region.<br/> <br />But Turkey - once Assad's close ally - is considering asking NATO to deploy Patriot missiles along its border.<br/> <br />Any placement of surface-to-air missiles could be the first step towards enforcing a no-fly zone over Syria.
