US military escalates bombardment of ISIL-held areas in eastern Syria after President Trump announced troop pull-out.

Despite assurances from Trump that ISIL is defeated, US raids against group in eastern Syria have intensified recently.

Scientists from Lausanne University say radon cannot be an explanation for elevated polonium levels

New report says former Palestinian leader was not poisoned by radioactive polonium and that he died of natural causes.

Documents show State Department knew of security problems in Benghazi but failed to fix them.