FBI investigating string of missing NASA and nuclear research scientists The IndependentSpeculation swirls around deaths and disappearances of staff at secretive government laboratories. Here’s what we know. CBS NewsWhite House, FBI looking into case of missing scientists: ‘No stone will be unturned’ The HillUFO mystery: White House asked about missing, dead researchers NewsNationMissing general, scientist deaths tied to secret US work prompt White House probe Fox News