The Cleveland and Milwaukee schemes show the first stage: vouchers as an escape route from awful public schools.

ECONOMIST: Sorting out school choice

What would be an upper stage, with a crew capsule and its emergency escape mechanism, is actually a simulator made to the correct shape and weight.

BBC: Nasa rocket launches successfully

Drilling the escape tunnels, it appears, is but one stage in each miner's rescue and recovery.

CNN: STORY HIGHLIGHTS