Defence Sec. Chuck Hagel said that "ISIL is as sophisticated and well-funded as any group that we have seen".
By paying ransoms, govts in the Mideast and Europe have become some of the biggest financiers of terror groups.
US has appealed all the sides to resolve the crisis through peaceful negotiations.
Dr Afia Siddiqqi was jailed by a US court for 86 years. She was arrested in Afghanistan in 2008.
Dr. Kent Brantly called Thursday a "miraculous day.''
Recently, Saudi Arabia's Grand Mufti Sheik Abdulaziz Al al-Sheik has described ISIS as "enemy number one of Islam".
As U.S. air strikes gather momentum, so too have Islamic State threats against the United States.
The Obama administration did not rule out the prospect of a military operation in Syria.
An estimated 1.2 million Iraqis have been displaced so far in 2014, including some 600,000 people uprooted.
Four officers were injured by rocks or bottles.
On August 9, 18-year-old Michael Brown was shot dead in broad daylight on a residential street.
India cancelled talks, raising objections to consultations held with separatist Hurriyat leaders by Pakistan.
The Secretary-General hopes local and federal investigations will "shed full light on the killing and that justice will be done."
The protests have been going on since Brown's death heightened racial tensions between the predominantly black community and the mostly white Ferguson Police Department.
The daughters essentially are trading places, and the vacation is boiling down to Obama getting about a week with each one.
Some of the youths carried signs protesting police brutality, TV images showed.
Governor Jay Nixon declared a state of emergency and announced a 5-hour curfew after a week of racially charged protests.
Police and about 200 protesters clashed in Ferguson, Missouri after another tense day in the St. Louis suburb.
The price offered on Thursday by the bidder surpassed the bid for 1954 Mercedes Benz W196 race car in 2013.
Thousands of families from the Yazidi minority community were trapped on the mountains without food and water.
US assessed that there are 'far fewer' members of the Yazidis minority group and are in better condition than previously believed.
Authorities closed roads around the capital in case of more landslides, and also shut the Quito airport.
United States stressed its readiness to fully support a new and inclusive government in Iraq's fight against the ISIL.
One Ohio airport is experimenting with a new, gentler way to avoid bird strikes: planting tall prairie grass.
We are urging him to form a new cabinet as swiftly as possible: US Secretary of State John Kerry.
American fighter aircraft struck and destroyed an ISIL checkpoint southwest of Mt Sinjar.
The killing drew criticism from some civil rights leaders, who referred to the 2012 racially charged shooting of 17-year-old Trayvon Martin.
US Secretary John Kerry urged the people of Iraq to remain calm amid the political and military upheaval.
The latest ceasefire began at 12:01 am local time on Monday.
Psaki said the U.S. rejects any effort to use coercion or manipulation in the process of choosing a new Iraqi leader.
US boy fights off nine-foot-long alligator by grabbing its jaws to free himself.
US officials with Kerry said he would be urging the Chinese and others to take voluntary steps to ease the mounting discord.
Obama justifies his decision to carry out targeted airstrikes in Iraq to prevent 'massacre of innocent people'.
Obama said the US may eventually do more to help Iraq repel the militant group, which seeks to control its own state.
The presence of several foreign and indigenous terrorist groups poses a danger to US citizens throughout Pakistan.
The blood of Africa runs through our family, Obama said amidst applause.