An Islamic fundamentalist group, responsible for the 9/11 attacks, formerly led by Osama bin Laden.
A string of bombings have struck cities under government control in Syria this year, including the capital Damascus.
Islamic State split from al Qaida in 2014, and the two groups have since waged an acrimonious battle for recruits.
Guantanamo Bay prisoner Khalid Sheik Mohammed charged that the series of deadly 2001 al-Qaida attacks that killed nearly 3,000 people were conducted in retribution for US foreign policy.
La crise identitaire que traverse l’Europe est-elle également une conséquence des attentats du 11 septembre 2001 ?
Attrition is a double-edged sword; Al-Qaida power was finally eroded to such a degree as to make the organization ineffective.
"As leader of the al-Qaida organization for jihad, I extend my pledge of allegiance once again, the approach of Osama to invite the Muslim nation to support the Islamic Emirate," al-Zawahri pledged.
Terrorist group upped attacks in Iraq and Syria – IHS Jane’s researchers.
Local activists and al-Qaida elements lash out at the Saudi government for arresting a well-known scholar who protested the decision to strip religious police of its authorities.
ISIS-affiliated media claim to show takeover of parts of the Yarmouk Palestinian camp which has mostly been under the control of al Nusra Front for a year.
Al-Qaida's branch in Syria storms demonstration in support of Syrian revolution in the northern province of Idlib.