Trump national security adviser jets to Turkey in bid to halt assault
Robert O'Brien, who has been national security adviser for a month, was due to meet Foreign Minister Mevlut Cavusoglu ahead of talks the following day between Vice President Mike Pence and Turkish President Tayyip Erdogan.
The Trump administration is trying to contain the fallout from Erdogan's decision to send forces last week to attack Syrian Kurdish militia, Washington's close allies. Erdogan repeated his insistence that there would be no ceasefire.
The Turkish assault, launched after a phone call between Erdogan and Trump, forced Washington to abandon a strategy in place for five years and pull its entire force out of northern Syria.
Syrian government forces, backed by Washington's adversaries Russia and Iran, have swiftly advanced into territory formerly patrolled by U.S. troops.
