A 1,300-pound NASA satellite is hurtling back toward Earth and could make an uncontrolled plunge through the atmosphere in just hours. A 1,300-pound NASA satellite is hurtling back toward Earth and could make an uncontrolled plunge through the atmosphere on Tuesday after nearly 14 years in orbit. The agency has been tracking the Van Allen Probe A and predicts it will reenter the atm... [2774 chars]