vaccine back in 1955. pave thing future for so many more immunizations. his research was made possible with the support from president roosevelt and the march of dimes. in celebration of the continued success of the march of dimes the u.s. mint releasing a commemorative silver coin featuring dr. salk and fdr. you can get your open by visiting u.s. manipulate.gov. >> parents a marylands a oddded with the government. child protective services picking up their kids for walking around without an adult. we asked you, how far would you let your kidsroom roam? >> wed inwithin wherever he when when we was eight. tiffani, the backyard, and she watches from the window. when charles was 12, his mother cut him lose on the entire city of austin. he could ride his bike anywhere as long as he was home before dark.