But once airborne, they still cannot fly any faster than hoi polloi.

ECONOMIST: Business jets

These latest 15 have been de-registered and the remaining cannot fly because they have been sold for parts.

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That also means they cannot damage the walls of the apparatus, since they do not fly through them, and makes the whole operation less radioactive, and thus safer.

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For example, aircraft flying to Kosovo might be allowed to fly over Serbia, which they cannot do now.

ECONOMIST: Serbia and Kosovo