On Friday, at an airport in Vienna,Austria, an American plane and a Russian plane landed, parked side by side and exchanged occupants.

VOA: special.2010.07.10

The government would pay for the silver with paper money -- treasury notes -- which could be exchanged for gold or silver money.

VOA: special.2010.06.03

SDRs,which are worth about $1.50 can be exchanged for the leading currencies, including the dollar, the euro and the yen.

VOA: standard.2009.04.20

Prosecutors say Mr.Taylor - then president of West African Liberia - exchanged the diamonds for weapons, which he smuggled into Sierra Leone.

VOA: standard.2010.08.05

Ba-hoku says that after some shots were exchanged, the pirates fled the ship.

VOA: standard.2009.09.26

, I came to the mujahadeen and I told them everything and we arranged together this attack to make the Americans understand that the belief of Allah, that eman which we hold, the fatwah that we strive for cannot be exchanged for all the wealth in the world."

VOA: standard.2010.01.09