61.   But several commissioners spoke of safety concerns about feeding sharks and the possibility that the predators could be conditioned to recognize humans as food sources.

62.   But naked DNA survives only a short time, and there are obvious safety concerns with viruses.

63.   But some safety concerns are warranted, with the increasing popularity of outdoor adventure activities and the corresponding boom in the number of companies offering guided adventure trips.

64.   But the automaker said the design addressed safety concerns raised by the number and size of large passenger vehicles on the roads.

65.   But the Clinton administration, citing safety concerns and under pressure from labor unions, never allowed the trucks to haul goods directly to their U.S. destinations.

66.   But over the last few years, a growing number of Millstone employees have complained that when they raised safety concerns, Northeast Utilities was unreceptive or downright hostile.

67.   But the crash spotlights the safety concerns inherent in Grand Canyon sightseeing flights.

68.   But some residents also talked of safety concerns because of the large numbers of unfamiliar troops swarming in.

69.   But the researchers called it a hopeful sign for the broader field of gene therapy, which has struggled with safety concerns after a few publicized deaths.

70.   But the way these vehicles handle has become a major safety concern.