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another straw poll victory. the president -- the republican presidential candidate finished first at the conservative values voter summit this weekend winning 37% of the straw poll vote. herman cain came in second with 23% and rick santorum finished third with 16%. herman cain said the bad economy is having a greater impact on african-americans but the gop candidate says racism is not the reason why. >> i don't believe racism in this country today holds anybody back in a big way. is there some -- are there some elements of racism? yes. it gets back to if we don't grow this economy, t...

There. and also record low mortgage rates. rick. rick: astronauts are working on critical repairs to the international space station. crews are on a second spacewalk. they are trying to fix a leaking bump in the schooling system. this is the system that helps all the electronic equipment on board the space station, keeps it from overheating. this has been called one of the most challenging repair jobs. it failed two weeks ago. nasa and mission control very concerned about all the electronics on board the space station. former astronaut tom jones actually is one who built the station. he willin...

>> from america's news headquarters, i'm marianne rafferty. a decision has been made to re-enter the west virginia coal mine for four miners are still missing. they are going to pump in nitrogen to neutralize the noxious gas and send in two rescue teams. the teams are carrying four oxygen masks into the mine. they have been missing since monday's explosion that killed 25 people. astronauts are beginning the first of three spacewalks during shuttle discovery's 14-day mission at this hour. their main task is to replace hay depleted ammonia tank in the international space sfaigz's schooling syste...