On Saturday, Carson said he also met with Jordanian medical professionals, humanitarian workers and government officials. And he struck a softer tone. “I saw pain on the faces of mothers and children,” he said. “Jordan is doing an amazing job opening its doors and extending a hand in relief. The rest of the world could be doing so much more. ”Carson also vowed to return to the United States to help the estimated 4 million Syrian refugees from the 4-year-long civil war and to replace the “failed policies” of the Obama administration with his own plan. The trip is also an opportunity for the retired neurosurgeon and first-time candidate to improve his understanding of U.S. foreign policy, which has been questioned during the campaign. Debate over Syrians fleeing their war-torn country has erupted following a series of terrorist attacks in Paris that raised security concerns across the West.