Related Clues:
- Those with a short time to live make the border in record time
- Mayfly - something short-lived
- Objects of short-lived usefulness
- Radar signals
- Something that lasts or is useful for only a short time
- Radar screen images
- Control tower spots
- Dots that may beep
- Something that lasts only a short time
- Time-sensitive items
- Things for here and now
- Short-term items
- Army engineers held back by broken-down heap - they'll soon be gone
- They're soon over border in record time
- Record them with period of history as time's going!