U.S. combat forces left last year and there have been a number of troubling signs this year. They include a rise in deadly attacks and renewed friction between Afghanistan and Pakistan.
In an audio statement attributed to the al-Qaida leader, Ayman Al-Zawihiri says he backs the Taliban's Mullah Akhtar Mansoor, who was chosen to replace the deceased Mullah Omar.
Irek Hamidullin, 55, a one-time Soviet tank commander in Afghanistan, stayed behind after Moscow's forces were withdrawn in 1988. He went on to mastermind a 2009 attack on an Afghan base.
Mullah Omar is credited with uniting many of the group's disparate factions and provided safe haven to Osama bin Laden. But little was known about the man. Renee Montagne talks to author Ahmed Rashid.
Renee Montagne talks to Graeme Smith of the International Crisis Group about Mullah Omar's rise to power, the details of his death and what this means for Afghanistan's peace talks with the Taliban.
Sources within the extremist organization confirmed the death of Mullah Omar, who reportedly died in 2013. A gathering of the group's leaders has chosen Mullah Akhtar Mansoor as his successor.
The Afghan government said Wednesday that Taliban leader Mullah Omar "died in April 2013 in Pakistan." The news comes just as peace talks between Afghanistan and the Taliban are due to resume.
Reports of the death of the Taliban's spiritual leader have swirled in the past and have been unreliable. The Afghan government said according to "credible information," Omar died in Pakistan.
In 1984, Steve McCurry was in Pakistan covering a refugee crisis for National Geographic. Captivated by a young girl's eyes, he clicked the shutter — and took one of the magazine's most iconic photos.