>> President Donald Trump's decision to arm Kurdish fighters in Syria has further exacerbated the United States' sensitive alliance with Turkey. Its foreign minister weighing in on Wednesday, stating the move posed a direct threat to Turkey's own security. And just a week before Trump's Turkish counterpart, Tayyip Erdogan, is scheduled to meet him face to face in Washington.
Syrian rebels, including the Kurdish fighters, known as the YPG militia, have long enjoyed support dating to the Obama administration in the form of air power and embeds from US Special Forces battling Islamic State. The Kurds, a key piece in American efforts against the jihadists, including their de facto capital in Syria, Raqqa.
But the direct supply of weapons to them is new and prods a complicated web of allies. Erdogan says the YPG are tied to separatists inside Turkey, regarded by both Ankara and Washington as terrorists. Turkish troops deployed into Syria have repeatedly clashed with the Kurds. This video said to show the aftermath of a Turkish airstrike against them.
US Marines, seen here, deployed to monitor Turkey's border after more fighting between them last month. Turkey, a NATO member, has pressed both Trump and Obama to drop support for the Kurds and focus on Arab rebels instead, as Raqqa is predominantly an Arab city.