Explainer: Where things stand for Afghanistan as Ghani visits US

The Afghan president begins a visit to Washington as Taliban makes huge advances across the war-ravaged country.

Afghan President Ashraf Ghani begins a visit to the United States at a time when the Taliban is making huge advances across the country. There are fears that already-demoralised Afghan security forces will be swiftly overrun when the remaining American troops withdraw. And peace talks between the Taliban and the Afghan government remain stalled. Here are some questions and answers about the situation on the ground, and the implications for Afghanistan: