YOSEMITE, Calif., May 3 (UPI) -- U.S. inspectors are warning of a buildup of carbon monoxide in the 74-year-old tunnel tourists use to see the granite peaks in Yosemite National Park.

WASHINGTON, Feb. 4 (UPI) -- Lax security has left U.S. icons, including the Washington Monument and the Statue of Liberty vulnerable, according to a government report released Monday.

WASHINGTON, Sept. 26 (UPI) -- A U.S. program to collect $10 billion a year from oil companies drilling on federal lands is riddled with mismanagement and distrust, an internal report found.

WASHINGTON, Jan. 18 (UPI) -- Flaws in federal oil leases could cost taxpayers up to $10 billion in lost royalty revenues, a congressional auditor told the U.S. Senate Thursday.