But some supplies certain kinds of weaponry or other sensitive cargo must be moved by air.

WSJ: U.S.'s Afghan Headache: $400-a-Gallon Gasoline

Yet, it is difficult to be certain that this is because they lack coverage or whether some other factor is at work.

FORBES: Can Markets Work in Medicine?

In some other limited instances, where there are certain exceptional or compelling circumstances, there will be a discretionary power for the lord chancellor to exempt payment of appeal fees.

BBC: Immigrants to be charged for appeals

This business is more or less stable and less influenced by certain macroeconomic factors that are capable of swinging profits of some other businesses such as broadcasting, publishing, parks and resorts etc.

FORBES: Time Warner's Stock Is Still Undervalued On Predictable Cash Flow And Growth