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Topic: John Callas

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NASA says Mars rover Opportunity back on the job after standby time
NASA says the Opportunity rover on Mars is back under Earth control after having been in standby mode while Mars passed behind the sun, blocking communications.
Rover begins 10th year on Mars
NASA says its rover Opportunity has begun its 10th year of "exploration and scientific discovery" on Mars by examining rocks on the rim of an ancient crater.
Mars rovers roll on after five years
The unmanned rovers Spirit and Opportunity are showing serious signs of wear after an astounding five years roaming Mars, U.S. space agency officials say.
NASA rover ready to leave Victoria Crater
The U.S. space agency's rover Opportunity will soon be back on Mars' plains after nearly a year in a large Martian crater studying ancient rock layers.
The U.S. space agency says a motor in the robotic arm of its Mars rover Opportunity that began stalling more than two years ago has become more troublesome.
The U.S. space agency, for the fifth time, is extending the program for its Mars Exploration Rovers.
The National Aeronautics and Space Administration said its Mars rover, Opportunity, reached its first destination inside Victoria Crater this week.
NASA's Mars Exploration Rover Opportunity entered Victoria Crater for the first time, reporting its information via the Mars Odyssey orbiter.
The National Aeronautics and Space Administration says both of its Mars exploration rovers -- Spirit and Opportunity -- have resumed functions.
National Aeronautics and Space Administration scientists said they are becoming increasingly concerned about the status of the Mars exploration rovers.
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Flags-In Ceremony at Arlington National Cemetery
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Staff Sgt. Jeffrey Roskos with the 3rd U.S. Infantry Regiment, "The Old Guard," participates in the annual Flags-In ceremony, May 23, 2013, at Arlington National Cemetery in Arlington, Virginia. Soldiers place American flags in front of more than 260,000 gravestones in the cemetery in honor of Memorial Day. UPI/Kevin Dietsch