1.   But some are good, especially.

2.   But some encryption systems are vulnerable, particularly those on Web servers where the keys are constantly in use.

3.   But some dealmakers who are still trying to fit all their pieces together are running out of time.

4.   But some prominent heart specialists, as well as an expert in clinical trial design, say PROVE IT may not be the gamble it appears.

5.   But some scares last much longer than two days.

6.   But some specialists view the dental and wrist X-rays as far from foolproof.

7.   But some advocates worry that the pendulum has swung too far in a world of diminishing returns for unskilled workers.

8.   But some analysts fear that may come too late to save the space program.

9.   But some parents born with greater abilities do far worse.

10.   But some Republicans fear that would be seen as anti-education.