and in the meantime, homeowners like jeff dahl are hit with a double whammy. >> we have been watching our numbers to make sure we're able to keep heating the house to a comfortable level through the remainder of the winter. >> reporter: with a lot more winter to come. john yang, nbc news, south holland, illinois. >>> the federal government said something today about iran that we don't hear very often. they said that iran has taken, quote, concrete actions that represent an important step forward. this came after iran moved to scale back its nuclear program, and the u.s. and europe started to lift some sanctions as part of that interim agreement. we get the story tonight from nbc's andrea mitchell. >> reporter: the seal of approval came from u.n. weapons inspectors today. disconnecting the centrifuges that have been producing iran's high-grade 20% enriched uranium. fuel that can easily be upgraded to power a nuclear weapon. >> everything going as planned. the 20% enrichment has been stopped. >> reporter: iran has complied by limiting its uranium enrichment to lower levels, granting ful