Islamic State

Saying his country will do "whatever is needed" to help fight the extremist group ISIS, Turkey's President Recep Tayyip Erdogan says he has reached what media are calling "a point of determination."

The parliamentary vote comes after Prime Minister David Cameron urged MPs to authorize participation, saying the self-declared Islamic State poses a "clear and proven" danger to his country.

Anjem Choudary, the former head of al-Muhajiroun, is said to be among those arrested on suspicion of encouraging terrorism or supporting a banned organization.

Many legal scholars say the White House lacks a legal justification for the strikes inside Syria. But the administration disagrees, saying its actions are covered by post-Sept. 11 legislation.

The facilities, captured by Islamic State militants earlier this year, are said to produce $2 million worth of refined oil each day to help fund the extremist organization.

The Syrian group, which the U.S. and a coalition of Arab partners has been striking in Iraq and Syria, is estimated to get as much as $6 million a day from the oil fields it has taken over.

The measure targets travel of militants abroad as well as recruiting and funding for extremist groups. It was adopted at a meeting chaired by President Obama.

The group calling itself Soldiers of the Caliphate released a video purportedly showing the beheading of kidnapped mountain guide Herve Gourdel.

The president, in an address to the General Assembly, says nations are at a crossroads and that the international system must meet challenges ranging from terrorism to disease.