51.   But unidentified ground controllers also were responsible for the accident, the Interfax news agency said, citing Star City spokesman Sergei Tafrov.

52.   Controllers were still able to track planes on their radar screens, but details about the aircraft were incomplete, said Arlene Salac, an FAA spokeswoman.

53.   Flight controllers also were concerned that rain south of the Kennedy Space Center might move into the area.

54.   Forward air controllers are essential to certain NATO operations.

55.   Hours after the launch, ground controllers were concerned that the satellite and two others aboard the rocket had failed to reach their orbit.

56.   It is possible it was detonated on purpose after Iranian controllers were satisfied with its performance, said a U.S. official who spoke on condition of anonymity.

57.   It was not clear whether the controller was among those killed.

58.   Navy officials would not immediately confirm reports that the ground controller was a member of the Navy.

59.   Russian ground controllers were pleased with the finding, saying the problem could be fixed soon, and with relative ease, from inside the space station.

60.   Solovyov said this time that flight controllers were more careful and prevented the loss of communication when they saw the voltage falling.