brian mooar, nbc news, washington. >>> the nation of chile celebrated sunday after discovering 33 men trapped deep in a copper and gold mine for 17 days are now alive and have taken refuge in an emergency shelter. holding a note sent to the surface by the miner, chile's president welcomed the news saying, quote, today all the country is crying from happiness. still rescuers say it could take another four months to actually dig the men out. until then, authorities will pass the miners food, water, oxygen and communication equipment through a narrow drilling hole. >>> iranian president ahmadinejad unveiled his country's first domestically built unmanned bomber yesterday according to state tv, the aircraft can reportedly carry up to four crew missiles and has a change of 620 miles. not far enough to reach israel. in a television interview, he offered his friendship to america, but quickly adding he doesn't fear an attack by the u.s. because it couldn't even defeat a small army in iraq. >>> a disgruntled former policeman is holding 16 people hostage on a bus in the philippines demanding h

brian mooar reports from washington. >> reporter: it's the kind of question presidents hate. how would you grade your time in office? >> it's incomplete because until the economy has rebounded, fully, and people are feeling better, we've got a long way to go. >> reporter: the question from cbs news is the same one voters will answer in this fall's congressional elections. and in recent weeks, the president has been making stops around the country explaining what he's done so far and why. >> the reason i did that was because i had confidence in you. i had faith in you. >> reporter: in detroit, he defended the bailout of gm and chrysler which are now adding workers to keep up with demand. he's reframing the old fights on health care reform, national security and the economy. >> the fact is the president's policies are killing job creation in america, killing our economy and the american people know it. >> reporter: congressional republicans are turning up the heat as they head home for their summer break. >> the elections were today, we'd certainly have a good day. but it's a l

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