As a parcel of dry air rises, it has to rise farther before it saturates with enough water to form the cloud base.

CNN: Clouds' role in global warming studied

Weather is inherently uncontrollable and difficult to predict, notes Dirnagl, but it is part and parcel of operating in the air emergency transport business.

FORBES: Air Methods: No. 1 Air Medical Emergency Service Provider Attracts Big Investors

United Parcel Service delivered a breath of fresh air to those fearing the economy might take a turn for the worst, posting a 48% surge in fourth quarter profits on higher volumes, more competitive pricing, and the continuation of its share buyback program.

FORBES: UPS Bullish On Economic Recovery, Raises Guidance As Profits Surge 48%

United Parcel Service (UPS): UPS Next Day Air, UPS Next Day Air Saver, UPS 2nd Day Air, UPS 2nd Day Air A.M.

FORBES: Tomorrow's Tax Deadline Pushed Off For Some Taxpayers

Solar Wind Energy (which used to be called Clean Wind Energy Tower, Inc.) is negotiating for a lease from the Bureau of Land Management (BLM) for a 1, 700-acre parcel of flat, empty desert on the Mexican border, right next to an Air Force bombing range.

FORBES: Massive Energy Skyscraper Proposed On U.S.-Mexico Border