Why do we have a "farsi-spoken-here" radio station?

Here I was minding my own business, reading a web post, by majd hooman, about dubya saying something stupid. Then I read that he said something stupid on ". . . Radio Farda, the U.S. government radio station that broadcasts into Iran in Farsi . . !"

Yikes! Who's paying for this? Read and weep. How much? A cursory web search reveals that Radio Farda may have had an $8 million dollar appropriation, in 2005, from the US Congress.