1.   But the new backups have taken time to develop and at times still seem lost.

2.   If a part fails, its backup instantly takes over, enabling the system to keep functioning.

3.   Should the primary chip somehow be damaged, a backup will take its place.

4.   What happened is the backup is taking up extra space.

5.   Such backup could take the form of air support, transport, intelligence or other support.

6.   Instead, the second-year American football backup has taken a starring role, upsetting the mighty Dallas Cowboys and overshadowing his high-priced teammate.