Tom Bowman

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KELLY MCEVERS, HOST:

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When it comes to foreign policy, presidential candidates Donald Trump says he will shake things up. He would build a wall along the Mexican border. He would take a tougher stance on China. And he would question America's premier military alliance.

The Pentagon hopes an ISIS chemical weapons engineer captured in Iraq last month will lead U.S. troops to possible weapons sites and help prevent chemical attacks by the Islamic State.

Defense officials hope that Sleiman Daoud al-Afari will help them find storage sites for chemical munitions including mustard agent, which can blister the skin and lungs and lead to death in high concentrations. Iraqi officials told the Associated Press that al-Afari worked for Saddam Hussein's military and has long been a member of ISIS, which seized portions of Iraq last summer.

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