reporter: in pittsburgh, dr. jim withers brings medical care and now vaccines to those experiencing homelessness. can i take a listen? have to go to where someone is and cut down those barriers. we provide something that can save a life and the lives of people that they come in contact with. it s a really unique and powerful feeling. anthony, i just want to say hi. hi. reporter: in philadelphia, dr. wendy ross low stress sense sorry friendly vaccination clinic for people with autism is a game changer. there s less waiting on line and we provide tools like fidgets. all of our vaccinators are educated to be sensitive and have strategies for vaccinating this population. all done. all done. good job! awesome. getting the vaccine to this
back jerusalem from the christians who had taken it from the muslims. you can watch jerusalem: city of faith and fury tonight at 10:00 right here on cnn. it might be the most expensive cake you will never eat. that s if you want a little slice of royalty. a piece of cake from prince charles and princess diana s wedding 40 years ago is now up for auction. it s expected to go for nearly $300. it features a coat of arms colored in gold, red, blue and silver. the slice is from one of the 23 cakes made for the royal wedding. but that s not all. also up for bidding, printed ceremonial and order of service programs for the wedding, as well as memorial royal wedding breakfast wedding program. that auction takes place august 11th. two cnn heroes, doctors jim withers and wendy ross are going the extra mile to make sure the people they serve don t miss out on life-saving measures. anderson cooper has more.