From NPR news, in Washington, I am Jean Cochran.US Special Forces launched a secret mission in Syria earlier this summer,aiming to rescue a number of Americans being held captives by militants,including photo journalist James Foley.But NPR Scott Horsley reports no hostages were found.President Obama authorized the raid once the government had what it thought was sufficient intelligence about where the hostages were being held.US Special Forces were dropped by aircraft inside Syria,but despite a firefight with militants, Foley and the other captives were not located.This week militants released a video tape showing Foley's brazenly execution in retaliation for US airstrikes in Iraq.Head defiant President Obama said the US will be vigilant and relentless and bringing the killers to justice.We keep in our prayers those other Americans who are separated from their families,and we will do everything that we can to protect our people, and the timeless values that we stand for.US war planes continue to strike targets inside Iraq.Scott Horsley, NPR news, Washington.Attorney General Eric Holder says he has assigned the federal government's most experienced agents and prosecutorsto look into that fatal shooting of an unarmed teenager by a white police officer in Ferguson, Missouri.We have brought up a substantial number of people here, a number of agents,who have done in the canvassing that they did over the past weekend.They continue to follow leads so that we can do a thorough and a fair job,