United States presidential inauguration

===Communication===
The way inauguration ceremony events are communicated to the public has changed over the years with each advance in technology. Improvements in [[mass media]] technologies have allowed presidents to reach substantially greater numbers of their constituents. In 1829, Andrew Jackson spoke to approximately 10,000 people at his inauguration.<ref>{{cite web|url=http://www.history.com/this-day-in-history/harding-becomes-first-president-to-be-heard-on-the-radio|title=June 14, 1922 Harding becomes first president to be heard on the radio|work=This Day in History|publisher=A&E Television Networks|access-date=January 31, 2017}}</ref> Most recently, in 2017, it is estimated that about 160,000 people were in the [[National Mall]] areas in the hour leading up to [[Donald Trump]]'s swearing in.<ref name="nyt average">{{cite news|last1=Wallace|first1=Tim|last2=Parlapiano|first2=Alicia|title=Crowd Scientists Say Women's March in Washington Had 3 Times More People Than Trump's Inauguration|url=https://www.nytimes.com/interactive/2017/01/22/us/politics/womens-march-trump-crowd-estimates.html|access-date=January 22, 2017|work=The New York Times|date=January 22, 2017}}</ref> An additional 30.6 million people in the United States watched it on television,<ref>{{cite news |url=https://www.washingtonpost.com/entertainment/tv/nielsen-31-million-viewers-saw-trumps-swearing-in/2017/01/21/31c18860-e029-11e6-8902-610fe486791c_story.html |title=Nielsen: 31 million viewers saw Trump's swearing-in |newspaper=[[Washington Post]] |date=January 21, 2017 |access-date=January 27, 2017 |archive-date=January 30, 2017 |archive-url=https://web.archive.org/web/20170130101733/https://www.washingtonpost.com/entertainment/tv/nielsen-31-million-viewers-saw-trumps-swearing-in/2017/01/21/31c18860-e029-11e6-8902-610fe486791c_story.html |url-status=dead }}</ref> and more than 6.8 million worldwide [[Streaming media|streamed it live]] on [[Twitter]].<ref>{{cite news|last1=Edkins|first1=Brett|title=Record 6.8 Million Watched Trump's Inauguration On Twitter's Live Stream|url=https://www.forbes.com/sites/brettedkins/2017/01/24/record-6-8-million-watched-trumps-inauguration-on-twitters-live-stream/|access-date=January 25, 2017|work=Forbes|date=January 24, 2017}}</ref> Among the inauguration [[mass communication]] milestones are:<ref name="inaugUSCap"/>
*1801 [[first inauguration of Thomas Jefferson]], first newspaper extra of an inaugural address, printed by the ''[[National Intelligencer]]''
*1845 [[inauguration of James K. Polk]], first inauguration to be covered by telegraph, and first known newspaper illustration of a presidential inauguration (''[[The Illustrated London News]]'')
*1857 [[inauguration of James Buchanan]], first inauguration known to have been photographed
*1897 [[first inauguration of William McKinley]], first inauguration to be recorded on film
*1905 [[second inauguration of Theodore Roosevelt]], first time that telephones were installed on the Capitol Grounds for an inauguration
*1925 [[second inauguration of Calvin Coolidge]], first inauguration to be broadcast nationally by radio
*1929 [[inauguration of Herbert Hoover]], first inauguration to be recorded by a talking newsreel
*1949 [[second inauguration of Harry S. Truman]], first inauguration to be televised
*1961 [[inauguration of John F. Kennedy]], first inauguration to be televised in color
*1981 [[first inauguration of Ronald Reagan]], first closed-captioning of television broadcast for the deaf and hard of hearing
*1997 [[second inauguration of Bill Clinton]], first time that the ceremony was broadcast live on the Internet