louis latimer by doing alexander graham bell's patent application drawings isall-around world. louis latimer by doing alexander graham bell's patent application drawings is at the foundation of telecommunications. these are important things. modern life would not exist without artificial lighting. his invention is import. and charles impacted so many lives because of the knowledge through the science of blood typing. this is a very important contribution worldwide. i hope that answers your question. don't have time to answer all three questions. >> host: charlotte, you are on. >> caller: what an honor it is to talk to you. talk about the buffalo soldiers and the significance of buffalo soldiers to american history. >> guest: very important to american history because the westward expansion of our nation. becoming a world power. we could not have done that if we -- the land the united states. it took people to go out and map roads, telegraph lines and explore the best places to live. this is accompanied by armed forces and infantry and buffalo soldiers were key elements of that e

lewis letter, by doing alexander graham bell's application drawings, he was right there at the salvation of telecommunication and electronics. also because of what he did with illumination and these are important things all around the world. modern lights would not be able to exist without artificial lighting. i think that his invention is very important. doctor charles has saved so many lives and impacted so many lives because of the knowledge that we have through the science of blood typing. again, this is a very important contribution worldwide. i think and i hope that answers your questions. sorry don't have time to answer all three. >> let's move on to charlotte in south bend, indiana. >> yes, hello. what an honor it is to talk to you. i wonder if you talk about the book you wrote about the buffalo soldiers and the significance of the buffalo soldiers to american history reign. >> well, i think the industry of buffalo soldiers is important to american history because the westward experience of our nation was a key element in to us becoming a world power. we could not have done that

bruce latimer, by doingthe alexander graham bell's patentsv application, he is right at the foundation of telecommunicationa and electronics.nd these are important things all t around the world. wit modern life would not exist without artificial lighting. i think that his invention is very important and doctor charles, who has saved so many lives and impacted so many weause of the knowledge that have through the science ofh thi blood typing. again, this is a very importantt contribution worldwide. i think that answers your question. sorry i cannot answer all thre. >> we will move on to charlotte whatouth bend indiana.llo. >> caller: what an honor it iswf to talk to you. i wonder if you would talk about the buffalo soldiers. and the significance of thefalo buffalo soldiers to americanign history. >> well, >> well, i think the industry of buffalo soldiers is very important. p western expirationow was key toe his becoming a world power. we could not have done that if we would not have utilized allu of the land that the unitedri states is comprised of.se in order to do this, it took tok pe