File photo of a Predator unmanned aerial vehicle undergoing pre-flight checks at an undisclosed location.

 
File photo of a Predator unmanned aerial vehicle undergoing pre-flight checks at an undisclosed location.
Members of the 11th Reconnaissance Squadron from Indian Springs, Nevada, perform pre-flight checks on the Predator unmanned aerial vehicle prior to a mission, at an undisclosed location in this November 9, 2001 file photograph. The U.S. government's unmanned Predator and Reaper drones are continuing to fly remote missions overseas despite a computer virus that has infected the plane's U.S.-based cockpits, according to one source familiar with the infection on October 8, 2011. Government officials are still investigating whether the virus is benign, and how it managed to infect the heavily protected computer systems at Creech Air Force Base in Nevada, where U.S. pilots remotely fly the planes on their missions over Iraq, Afghanistan and elsewhere. REUTERS/U.S. Air Force/Handout/Files (UNITED STATES - Tags: MILITARY TRANSPORT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED