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>> in davenport, iowa, more fopartment building that partially collapsed on sunday. heavy machinery is now removing debris come as search and recovery efforts continue. ♪ ♪ >> mosquitoes. they are pesky and persistent. there is a reason you may be feeling more bites this summer. >> what attracts mosquitoes to us? ♪ ♪ >> semi file. >> norah: there is a new spelling bee champion and the winning word was h-a-r-d. >> it is still kind of surreal. >> norah: and it is friday so we go "on the road." >> i couldn't read. >> started teaching yourself? >> practice makes perfect. >> dotti...

>> norah: mosquitoes. they are pesky and persistent. >> i go outside, a mosquito already bit me. >> reporter: and they are attracted to humans, likely because the females need blood to reproduce. >> they are very sophisticated little bugs. >> reporter: catherine roberts is a health and science editor for "consumer reports." what attracts mosquitoes to us? >> it really can depend on what you are wearing, your skin. different people are more attractive than others appeared to be to a recent luminary study by virginia tech found that certain soaps with a floral or fruity scent made people even mo...