Secretary of Defense Ash Carter says the increase, which brings the American total to about 5,000, anticipates a major operation to retake the Islamic State-held city of Mosul.
Troops returning from Iraq and Afghanistan are far more likely to develop post-traumatic stress disorder if they have suffered a concussion. The reason may be a change in the brain's fear circuits.
The U.S. went to war after Sept. 11 and has now been fighting for 15 years, the longest unbroken period in its history. Despite disappointing results, there's broad consensus it should continue.
The AP documented 72 mass graves across Iraq and Syria attributed to ISIS. Renee Montagne talks to Naomi Kikoler who works with populations at risk of genocide for the U.S. Holocaust Memorial Museum.
Using interviews and photos, the wire service has mapped the locations of 72 mass graves in territory once occupied by the Islamic State — including five at the foot of Iraq's Mount Sinjar.
They were accused of carrying out the 2014 ISIS massacre of over a thousand Iraqi troops. The U.N. discouraged fast-tracking the executions, saying torture may have been used to extract confessions.
"We need to get politics aligned with the security threat we all face. ... We're all thinking about our own elections rather than ... the strategic leadership needed," says Lukman Faily.
A court award of half a million dollars to a kidnapped aid worker — and an increase in kidnappings — has spurred humanitarian groups to create better security plans.
An ISIS bombing in Baghdad killed more than 300 Iraqis in early July. One of them, Adil Al-Faj, known as Adil Euro, went against cultural norms as a break dancer who dreamed of dancing in New York.