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SCIENCE  
Reentry of NASA satellite will exceed the agency's risk guidelines
- "Due to late-stage design changes, the potential risk of uncontrolled reentry increased." A NASA satellite that spent more than a decade coursing through the Van Allen radiation belts encircling Earth is about to fall back into the atmosphere. Most of the spacecraft will burn up during reentry, but a fraction of the material making up the 1,323-pound (600-kilogram) satellite will likely reach Earth's surface ...

Source: arstechnica.com