11.   An artillery shell struck here at breakfast time, but by now the base was on red alert, its soldiers under cover.

12.   A red alert, which has never gone out, would be issued if a bill comes back from conference in excess of the House-passed level.

13.   It has triggered a red alert among the independent inventors who have waged a losing battle against revisions of intellectual property laws.

14.   It was a red alert beamed out across America.

15.   Moscow police were put on red alert and Russian authorities promised they would move swiftly to apprehend those responsible.

16.   Red alert, red alert.

17.   Security at the entrances to the private affairs called to mind an airport under a red alert.

18.   Since the highly contagious foot-and-mouth broke out in England in late February, Ireland has been on red alert.

19.   Staff on red alert.

20.   Some say the mere fact that Greenspan suddenly seems more worried than usual about inflation is enough to justify a red alert.