"That's not that much considering U.S. inventories are very low."

Oil prices fell to their lowest levels in nearly a year on the prospect of Iraqi exports and bulging U.S. inventories.

In addition to the U.S. inventory, greenhouse gas emissions can be tracked at the global, state and local levels as well as by companies and individuals:

The Pave Low gave the theater commander a night, all-weather personnel recovery capability, unparalleled in the U.S. inventory.

"We're putting a ceiling on the U.S. inventory" of land mines, said Robert Bell, the National Security Council senior director for defense policy and arms control.

May 29 Natural gas futures plunge 6% to a 10-month low on speculation that growing U.S. inventories will help power plants meet summer demand for air-conditioning.

In 1965, Halibut had been configured to use deep submergence search equipment, the only such specially-equipped submarine then in U.S. inventory.

U.S. inventories of commercial crude oil hit their highest level in February 15, 2013 since July 2012.

The current U.S. inventory contains 13,400 missiles.

Since none of those are known to have been used as of early 2007, the U.S. inventory of GBU-43/B presumably remains at approximately 15.