At an estimated 90 billion barrels of oil reserves, Iran was once thought to be the fifth largest producer of oil in the world. Now, they've discovered a previously unknown bonanza of oil in Iran, estimated to be another 38 billion barrels of oil.
The mad mullahs are swimming in the oil wealth.
Having this much oil available, you can see why Iran needs to restart its nuclear enrichment program make enough nuclear fuel to support nuclear power plants -- purely for peaceful purposes of course.
What other explanation could there be?