cant get any info now, page-47

A locked door - signifies opportunities that are denied and not available and that those not in have missed out on.

Opportunity:
1. An uncertain event with a positive probable Consequence. Related to Risk.
2. A favorable or advantageous circumstance or combination of circumstances.
3. Opportunity (official designation: MER-B) is the second of the two rovers of NASA's Mars Exploration Rover Mission.

The D in D-Day stands for Day. The first letter is repeated to emphasise the day that an operation (something big?) will begin.

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