Iranians protested the jihadi group after twin suicide-bomb attacks earlier this month.
Baghdadi is the most-wanted man in the world.
Militants kidnapped the professors in Kabul in an August raid.
Without the oxygen of publicity, the attacker is just that: a killer with a car and a knife. The lone wolf needs the pack as much as the pack needs the lone wolf.
Finland has become more concerned after attacks in neighboring Sweden and Russia.
"You and your agents are the source of instability in the Middle East," Ayatollah Khamenei tells the United States.
Radical Islam must be recognized and destroyed across the West, writes Chief Rabbi Goldschmidt.
The attacks in the Iranian capital striking the country's parliament and a shrine killed 17 people.
The Islamic State militant group claimed responsibility for twin attacks in the Iranian capital that killed 13 people.
The group said two of its fighters carried out the attacks, which killed seven people.
The attacks in the Iranian capital left at least seven dead, according to local reports.
The video features Emirati star Hussain al-Jassmi and has more than 2 million YouTube views.
Across the Arab world, changing demographics, a lack of basic rights and Western interventions all drive young people toward extreme violence.
Suicide bomber Abedi was one of 20,000 people known to MI5 but not one of the 3,000 people under active investigation.
The New York Times posted leaked images of the remnants the suicide bomber's device on Thursday.
Ramadan Abedi denies his son's involvement in the attack on Manchester Arena.
The 37-year-old was due to board a flight for Turkey Tuesday evening.
Top spies say European security services are more disciplined than their U.S. counterparts.
Viktor Ozerov, chairman of Russia's defense committee, says Britain is at fault for not working with Moscow.
The Queen condemns "act of barbarity" in the northern English city.
The suicide bombing killed 22 people, including children, on Monday night.