Feb 10, 2014 - Americans mourn slain hostage Kayla Mueller

President Obama led the mourning for Kayla Mueller, the 26 year-old aid worker from Arizona whose death in Syria was confirmed by her family. The US is holding IS responsible for Kayla Mueller's capture and death, more than 2 years after she was seized during an attachment to a hospital in Aleppo. Simon reported the story for several global radio stations, including "Checkpoint" on Radio New Zealand. #kaylamueller #IS #Obama #Syria