U.S. says ISIS did not down plane

ordan is one of several nations helping the United States and other Western nations degrade and destroy ISIS which has cut a murderous path through Iraq and Syria in its ultimate quest to establish a caliphate, or Islamic state, across those countries.

The air campaign has recently stepped up against Raqqa, located on the banks of the Euphrates river. In the beginning of December, for example, the coalition hit the city with 30 air strikes in a single night. There was one coalition airstrike in the area on Wednesday and one on Monday, according to the U.S. military.

What nations are part of the U.S.-led coalition

It's critical that Jordan lead an investigation to determine exactly what happened, Maj. Gen. Ali Shukri, a retired Jordanian commander and military adviser, told CNN. He said he doesn't think the capture will change Jordan's role in the fight against ISIS.

Al-Momani on Wednesday acknowledged the "enormity of this incident" but said it was his nation's choice "to fight those terrorist organizations that threaten Jordan's security."

"Jordan participated in this war acknowledging that this war will have casualties," he said.

Bordering Syria, Iraq and Israel, Jordan has been a critical regional player in the coalition and has a history of working with Washington.

Though the United States has led the coalition, President Barack Obama has maintained that there will be no U.S. ground troops in Syria.

But the Defense Department last week announced that up to 1,300 more U.S. troops, including approximately 1,000 soldiers from the Army's 82nd Airborne Division, will begin to deploy to Iraq in late January.

Pentagon Press Secretary Navy Rear Adm. John Kirby said December 19 that the mission is to train, advise and assist Iraqi security forces.

The U.S. led-coalition has relied tremendously on a number of other countries to help militarily as well as to help legitimize the effort internationally.

Other key regional allies include Turkey, Saudi Arabia, and the United Arab Emirates. The coalition has been conducting nearly constant airstrikes against ISIS in Syria since September, an effort that began weeks after first going after the group in neighboring Iraq. In that period, the coalition has said it landed several strikes that have damaged ISIS infrastructure, equipment and fighting capacity.

While Iraq has posed complex battle demands, Syria has its own set of complications.

The country has been ravaged by years of civil war as forces try to unseat Syria President Bashar al-Assad. Those forces are not only fighting al-Assad now, but trying to keep up the strength to fight ISIS.