1. It will vest in stages over four years from May 2015.

2. At the time, those shares were to vest in equal parts in August 2016 and August 2021.

3. The stock and options were scheduled to vest over four years.

4. The equity awards will vest over several years, in most cases depending on company performance.

5. The bulk of those vest if certain financial targets are met.

6. The law enforcement source told CBS News that authorities believe one vest detonated by accident.

7. The vest wearer could also sound an alarm or otherwise to indicate an approaching truck.

8. She survived after her suicide vest failed to explode.

9. Video footage shows the attacker playing with his vest and the vest exploding, the source said.

10. He said chances of survival for more than 24 hours without a life vest were very slim.

11. Once finished, he and his team fit us each with a tactical vest, helmet and night vision goggles.

12. These awards will vest over four years.