While researching Yosemite's archives, he learned that for three years, around the turn of the twentieth century, black U.S.Army regiments patrolled the park.

VOA: standard.2009.11.25

The Gadhafi affair follows concessions by Switzerland's biggest bank,UBS, to turn over data on 4,500 wealthy American clients suspected of tax evasion to U.S.authorities.

VOA: standard.2009.08.23

But Republicans insist only the private sector, and not government, can turn the U.S.economy around.

VOA: standard.2010.06.18

The idea is to replicate the so-called Sunni Awakening in Iraq's Anbar province, where the U.S.exploited simmering resentment of al-Qaida to turn the tribes against the radical insurgents.

VOA: standard.2009.03.11

U.S.officials acknowledge that, even if the situation in Afghanistan begins to turn during the next 12 months, the U.S.withdrawal will likely be very gradual, and some number of international troops will be needed in Afghanistan for many years to come.

VOA: standard.2010.07.22