Iraqi Defense Minister Khaled al-Obeidi visited the region Thursday, saying on state TV that the next phase of the operation is "critical" to the effort to control the strategic city of Tikrit.
ISIS militants now control the long-running black market in stolen artifacts. Experts are tracking damage to heritage sites in Iraq and Syria by satellite and doing what little they can to stop it.
The self-proclaimed Islamic State has recruited more than 2,000 young Saudi men. Some have already come back to carry out attacks on Saudi soil. The kingdom is preparing to confront the threat.
The Nigerian Islamist militant group has traded grainy videos for slick productions. This week, Boko Haram posted a video purportedly showing the bodies of two beheaded men accused of spying.
A local source says that Iran, which has already been aiding Iraq with artillery and intelligence support, has sent fighters to help take the city of Tikrit.
An Iraqi force has begun a large-scale operation to recapture the city, according to state TV. Tikrit, the hometown of Saddam Hussein, lies between Baghdad and Mosul.
When NPR's Alice Fordham visited Mosul in 2010, bird droppings and rain were the biggest threats to its archaeological sites. Now ISIS has destroyed artifacts that had endured for millennia.
The family of Steven Sotloff said they hoped the man identified as Mohammed Emzawi is brought to justice. The daughter of aid worker David Haines said she wanted a "bullet between ... [his] eyes."