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

"Now they are checked by Interpol. Before we did not have a communications system that allowed information to be exchanged rapidly around the world with all of our countries.

VOA: standard.2009.11.09

, 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