Related Clues:

• Security devices
• APBs
• Some computer messages
• States of readiness
• Fire and burglar, e.g.
• Plus and minus, for two
• 2002 Mel Gibson film
• Notices
• APBs, e.g.
• Sagittarius and Virgo, e.g.
• Color-coded government announcements
• Colorful warnings
• Sounds the alarm, e.g.
• Startles
• STOP and YIELD e.g.