Blinken's plane grounded in Zurich due to mechanical issue after Davos visit
• Blinken's plane suffers "mechanical issue" after leaving Davos, is stuck in Zurich • Air Force sending replacement plane to bring Blinken back to US Wednesday night • Issue happened after Blinken spoke at Davos panel on need for stability in Middle East • Blinken was returning from weeklong Middle East trip aimed at easing regional tensions • Issue caused several hour delay; Blinken still expected back in US Wednesday night