Analysts are concerned about capital expenditures, especially costs to maintain equipment and to replace aging buildings.

WSJ: Data-Center REITs Lose Favor

In 2006 the mine decided to upgrade its equipment, including the aging Cat fleet, its managers say.

FORBES: Magazine Article

The Marine Corps is being forced to consider further personnel cuts in part because of the expense of modernizing equipment, in particular its aging amphibious assault vehicles and its fighter jets.

WSJ: General Expects Marine Corps to Shrink Due to Sequester

Nabi expects capital spending will be a major force, which he believes will remain robust, powered by two sources of demand: replacement of aging plants and equipment, and U.S. exports, mainly to emerging countries.

FORBES: Ray of Optimism: Energy, Durable-Goods, And Insurance Stocks Are Irresistibly Inexpensive

Tech companies like IBM have benefited this year as companies replace aging information-technology equipment with new gear and services, including cloud-based services, after putting off such investments during the recession.

FORBES: Buffett's IBM buy highlights tech companies' gains

Transforming education so that it meets the needs of all children is a complex and difficult task that spans issues ranging from the global shortage of trained, qualified teachers--UNESCO estimates that we need 18 million new teachers to meet current demand--to the problems of overcrowded schools, aging infrastructure, obsolete equipment and textbooks, and outdated teaching methods and curricula.

FORBES: Magazine Article

By using high-tech imaging equipment, scientists hope to examine the body to better understand not only the aging process but also how man has evolved.

CNN: 'Death can tell us a lot about living,' mummy expert says