The Afghan government says Taliban leader Mullah Omar is dead.
But several key terror figures are still at large. Here are some of the world's most wanted terrorists. Ayman al-Zawahiri is the current commander of Al-Qaeda. He was Osama bin Laden's right-hand man and the group's operational leader. Some think he had a bigger role planning the 9/11 attacks than his boss.
Today, his group is fighting ISIS for supremacy, which he cut ties with in 2014. As for Zawahiri, it's believed he's hiding out somewhere in Pakistan's tribal areas.
As the head of ISIS, Abu Bakr al-Baghdadi considers himself the leader of the world's Muslims and his so-called caliphate. Little is known about Baghdadi. In fact, Baghdadi isn't even his real name.
Earlier this year, there were rumors he had been killed in an airstrike.
But in May, the reclusive leader released an audio recording, calling on Muslims to pledge allegiance to ISIS.
See photos of the terrorists:
Top terrorists still at large
Who are the top terrorists still at large?
FILE - This file image made from video posted on a militant website Saturday, July 5, 2014, which has been authenticated based on its contents and other AP reporting, purports to show the leader of the Islamic State group, Abu Bakr al-Baghdadi, delivering a sermon at a mosque in Iraq during his first public appearance. Twelve years after the U.S. invaded Iraq to topple Saddam Hussein, the country is still mired in war. The latest phase: An existential battle against Islamic State group militants. For Iraqis, it feels like one long war, one that many blame on the United States. (AP Photo/Militant video, File)
** FILE ** Shown on a computer screen is a frame grab from a DVD prepeared by Al-Sahab production showing al-Qaida's No. 2 leader Ayman al-Zawahari delivering his address seen in Islamabad, Pakistan, shown June 20, 2006. When four Islamic radicals blew themselves and dozens of innocent commuters up on the London transportation system on July 7, 2005, it took nearly a month for al-Qaida No. 2 Ayman al-Zawahri to release a comment, saying in an Aug. 4 video tape that Britain itself was to blame for the carnage. (AP Photo/B.K.Bangash)
FILE - In this May 12, 2014 file image from video by Nigeria's Boko Haram terrorist network shows their leader Abubakar Shekau speaks to the camera. The leader of Nigeriaâs Islamic extremist group Boko Haram denied agreeing to any cease-fire with the government and said more than 200 kidnapped schoolgirls all have converted to Islam and been married off. In a new video released late Friday, Oct. 31, 2014, Abubakar Shekau dashed hopes for a prisoner exchange to get the girls released. âThe issue of the girls is long forgotten because I have long ago married them off,â he said, laughing. âIn this war, there is no going back.â (AP Photo/File)
#ISIL recruits ‘underwear bomb’ creator: Al-Asiri pledges allegiance to terrorist army http://t.co/UxEeNozS8A #mil http://t.co/MtVSWveznd
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Abubakr Shekau is the leader of Boko Haram. For the past six years, his group has terrorized Nigeria with a wave of bombings and mass kidnappings.
Shekau has pledged allegiance to Baghdadi — making Boko Haram one of ISIS' biggest affiliates.
Shekau's exact whereabouts are unknown. The Nigerian military has claimed to have killed him before, but he always resurfaces in propaganda videos like this one.
Ibrahim al-Asiri is Al-Qaeda's master bomb-maker and a prominent figure in its Yemen-based affiliate, Al-Qaeda in the Arabian Peninsula or AQAP.
The Saudi chemist was likely behind the underwear bomb a Nigerian terrorist smuggled onto a U.S. airliner in 2009.