It takes up to 10 years to raise a female sturgeon, but harvesting at exactly the right moment should take no more than 10 minutes, from slicing open the fish to packing the salted eggs in special containers, which allow the caviar to breathe, thus continuing maturation and allowing taste and character to develop.

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Much of the food that comes from abroad, comes on "reefers", special refrigerated ships, or in refrigerated containers on ordinary ships.

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According to the agency, carry-ons will be limited to medication or medical devices, small purses, cameras, coats, infant-care items, laptop computers, containers carrying life-sustaining or special-needs items, musical instruments, or diplomatic or consular bags.

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All the items had to fit inside small plastic containers which were then mounted on to a special tray beneath the balloons.

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