1. Hindsight is always twenty-twenty.

2. You need twenty-twenty vision for this job.

3. A pilot must have twenty-twenty vision.

4. twenty-twenty hindsight can have tremendous value if you accept the hard-won wisdom and move on with life and love.

5. I hope that the account that follows will seem straight forward-but it is written with the twenty-twenty vision of hindsight.

6. Two years ago, Mr. Obama set a goal to regain the world's highest rate of college graduates by twenty-twenty.

7. And they are expected to become the leading cause of death in many African nations by twenty-twenty.