61.   But in part because of security concerns, slow connections and other problems, grid computing has been slow in gaining acceptance.

62.   But Israel has repeatedly delayed redeployment in Hebron over security concerns.

63.   But his government continues to cite national security concerns in denying congressional requests for access to army and other files that could shed light on the events.

64.   But major changes in the sanctions are unlikely, given the high national security concerns that the United States has with Iran, officials said.

65.   But malls also must balance their need to keep young shoppers happy against legitimate security concerns.

66.   But Ms. Lewis said the use of restraints after birth was so routine that it seemed as if medical and security concerns were not being weighed properly.

67.   But officials at BU and elsewhere say they would never let financial interests drive security concerns.

68.   But several people involved in the excavation were reluctant to talk about this discovery because of security concerns.

69.   But officials continue to voice security concerns in defending the checkpoints.

70.   But the Pentagon mission to China has drawn fire from critics who accuse Washington of subordinating human rights and national security concerns to economics.