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Pap smears to check for cervical cancer. chest x-rays before surgery. the study reminds doctors of one of medicine's cardinal rules -- first, do no harm. medical testing is a good thing when you need it. but you have to ask some questions. what is the test for? if it's being ordered, what's going to be done with the information? is there another way to get the information, like a good physical or better questions? we have a list of all 45 tests that have been overused at abcnews.com. check it out and see if you've been overtested. dr. richard besser, abc news, new york. >> thanks to dr. richar...

Gingrich. that's the memo. top story tonight. rick santorum polling around 13% in florida. he is not campaigning there today. his daughter bella is in the hospital with numerous la. senator santorum has to care for her in addition to carrying on with his campaign. the senator joins from us st. louis. how is bella today, senator. >> she is much better. yesterday afternoon she really made a turn and the chest x-rays dramatically improved. i just want to thank everybody for their prayers and outpouring of support for bella and karen and the family. it worked. i mean, she had a very, very tough ti...

Leaked?. >> he said containment building contained 99% of the radiation within that building. so numerous studies have been conducted over years and the most that he says anyone could have been exposed to would be equivalent to the amount of two chest x rays. >> two? >> that is what they came. >> geraldo: that is not much. are these guys lending expertise to the japanese? >> they have offered expertise to the nuclear energy institute. japan is now taking their help. >> geraldo: g joining us now we're going to get back to special coverage of the libyan civil war, our involvement in it this is p...

Leaked?. >> he said containment building contained 99% of the radiation within that building. so numerous studies have been conducted over years and the most that he says anyone could have been exposed to would be equivalent to the amount of two chest x rays. >> two? >> that is what they came. >> geraldo: that is not much. are these guys lending expertise to the japanese? >> they have offered expertise to the nuclear energy institute. japan is now taking their help. >> geraldo: g joining us now we're going to get back to special coverage of the libyan civil war, our involvement in it this is p...

Leaked?. >> he said containment building contained 99% of the radiation within that building. so numerous studies have been conducted over years and the most that he says anyone could have been exposed to would be equivalent to the amount of two chest x rays. >> two? >> that is what they came. >> geraldo: that is not much. are these guys lending expertise to the japanese? >> they have offered expertise to the nuclear energy institute. japan is now taking their help. >> geraldo: g joining us now we're going to get back to special coverage of the libyan civil war, our involvement in it this is p...