![A 1955 map of proposed highways prepared by the Secretary of Commerce for the House Committee on Public Works.](/sites/default/files/styles/large/public/SB1%20Needs%20of%20the%20Highway%20Systems.gif?itok=C5sBhuTx)
Needs of the Highway System, 1955-1985
![An 1831 cartoon ridiculing Henry Clay for his program of tariffs and internal improvements.](/sites/default/files/styles/large/public/SB3%20The%20Monkey%20System.png?itok=rqgaqUCX)
The Monkey System
![A portion of the Hollywood Freeway opened in 1951 with much fanfare.](/sites/default/files/styles/large/public/1%20Hollywood%20Freeway%20Opening.jpg?itok=KAzSWXNH)
Hollywood Freeway Opening
![Workers survey the damage after a commuter train crashed into a passenger car near Valhalla, NY in 2015.](/sites/default/files/styles/large/public/2%20Valhalla%20Train%20Crash.jpg?itok=EUn66L0J)
Valhalla Train Crash
![Minneapolis I-35 Bridge collapse.](/sites/default/files/styles/large/public/3%20I-35%20Bridge%20Collapse.jpg?itok=L0AQCp8U)
I-35 Bridge Collapse
![First Bank of the United States.](/sites/default/files/styles/large/public/4%20First%20Bank%20of%20the%20United%20States.jpg?itok=dWHmV4xn)
First Bank of the United States
![The 1993 unveiling of the road sign for the Dwight D. Eisenhower National System of Interstate and Defense Highways.](/sites/default/files/styles/large/public/5%20Eisenhower%20Interstate%20System.jpg?itok=61gq6egT)
Eisenhower Interstate System
![An 1846 map of the United States with roads, rails, and canals.](/sites/default/files/styles/large/public/6%20A%20New%20Map%20for%20Travelers.png?itok=4QP9Y6jy)
A New Map for Travelers
![A 2010 map depicting the availability of Broadband Networks in the United States by county.](/sites/default/files/styles/large/public/7%20Availability%20of%20Broadband%20Networks.png?itok=JVVl7ZlC)
Availability of Broadband Networks
![A ceremony in Promontory Summit, UT in 1869 for the completion of the First Transcontinental Railroad.](/sites/default/files/styles/large/public/10%20First%20Transcontinental%20Railroad.jpg?itok=BpsF6u5w)
First Transcontinental Railroad
Last of the Horse Drawn Carriages
![Sears, Roebuck & Co. offered free delivery through the Post Office's Rural Free Delivery service for its thousands of mail-order goods.](/sites/default/files/styles/large/public/12%20Sears%2C%20Roebuck%20%26%20Co..jpg?itok=25imwj5a)
Sears, Roebuck & Co.
![The Post Office encouraged its Rural Free Delivery carriers to adopt automobiles.](/sites/default/files/styles/large/public/13%20Rural%20Free%20Delivery.jpg?itok=4S2-oCPB)
Rural Free Delivery
![The 1903-1904 Montgomery Ward & Co. Catalogue.](/sites/default/files/styles/large/public/14%20Montgomery%20Ward%20%26%20Co.jpg?itok=1klktrhg)
Montgomery Ward & Co.
![A photograph of a road construction crew in the 1920s building the Yolo Causeway.](/sites/default/files/styles/large/public/15%20Surfacing%20the%20Yolo%20Causeway.jpg?itok=wRMj5iZW)
Surfacing the Yolo Causeway
![Farmers gathered at a foreclosure auction in Iowa during the 1930s.](/sites/default/files/styles/large/public/18%20Aftermath%20of%20Inflation.jpg?itok=-k06H8tp)
Aftermath of Inflation
![An Office of Emergency Management poster.](/sites/default/files/styles/large/public/19%20Veterans%20Prepare.jpg?itok=oABRtPwF)
Veterans—Prepare For Your Future
![An advertisement for home loans available to veterans.](/sites/default/files/styles/large/public/20%20Remodel%20for%20Veterans.jpg?itok=T9Gl3MPM)
Remodel for Veterans
![A graph depicting U.S. births by year with the 'Baby Boom' generation in red.](/sites/default/files/styles/large/public/21%20US%20Births.gif?itok=lzgxJ70H)
U.S. Births: 1940-1980
![In 1962, NASA began construction on the Vehicle Assembly Building.](/sites/default/files/styles/large/public/22%20Vehicle%20Assembly%20Building.jpg?itok=O-rxpVDy)
Vehicle Assembly Building
![A 1957 map depicting the routes to be added to the National System of Interstate and Defense Highways.](/sites/default/files/styles/large/public/23%20Routes%20to%20be%20added.jpg?itok=7Aff56jl)
Routes To Be Added
![President Dwight D. Eisenhower discussing plans for the interstate highway in 1955.](/sites/default/files/styles/large/public/24%20Eisenhower%20and%20Interstate%20Highway.jpg?itok=3D4ZWuSE)
Eisenhower and Interstate Highway
![The High Five Interchange in Dallas, Texas.](/sites/default/files/styles/large/public/26%20High%20Five%20Interchange.jpg?itok=c0mxc-K_)
High Five Interchange
![A graph depicting U.S. petroleum production and imports from 1920 to 2005.](/sites/default/files/styles/large/public/28.pngUS%20Oil%20Production%20and%20Imports_0.png?itok=Ki00BDHZ)
U.S. Oil Production and Imports
![A gas station in Portland, OR during the oil shortage in 1973 with long lines of cars waiting for gas.](/sites/default/files/styles/large/public/29%20Oil%20Shortage.jpg?itok=MCnThUio)
Oil Shortage
![Students at the University of Michigan listen to a speaker at the first Earth Day in 1970.](/sites/default/files/styles/large/public/30%20Earth%20Day%20Teach-in.jpg?itok=Cq-6EZIU)
Earth Day Teach-In
![Senator Edmund Muskie delivering the keynote address.](/sites/default/files/styles/large/public/31%20Senator%20Edmund%20Muskie.jpg?itok=oOZmn3Ir)
Senator Edmund Muskie
![A graph depicting the U.S. federal debt as a percentage of gross domestic product from 1940 to 2015.](/sites/default/files/styles/large/public/32%20US%20Federal%20Debt%20as%20a%20Percent%20of%20GDP.png?itok=-t4y9z23)
U.S. Federal Debt as a Percent of GDP
Petroleum Use and Urban Density
![A protestor at the Occupy Wall Street Protests in 2011 with a sign calling for the re-regulation of banks.](/sites/default/files/styles/large/public/41%20Occupy%20Wall%20Street%20Protestor.jpg?itok=Esz9ZAmq)
Occupy Wall Street Protestor
![The BBN Interface Message Processor.](/sites/default/files/styles/large/public/43%20ARPANET%20Transmission.jpg?itok=IL7MbW02)
ARPANET Transmission
![A 2014 map showing global Web Index scores.](/sites/default/files/styles/large/public/45%20Web%20Index%20Scores.png?itok=B79w8mkk)
Web Index Scores
![The first web server with a note still attached reading: 'this machine is a server, do not power it down.'](/sites/default/files/styles/large/public/46%20First%20Server.jpg?itok=BxLkwbwr)
First Server
![A drawing of the Internet of Things.](/sites/default/files/styles/large/public/49%20Internet%20of%20Things.jpg?itok=tQxp6G9z)
Internet of Things
![Orchard Pond Parkway in Tallahassee, FL.](/sites/default/files/styles/large/public/50%20Orchard%20Pond%20Parkway.jpg?itok=ATxwvxqz)
Orchard Pond Parkway
![The city of Chicago leased out the Chicago Skyway for 99 years in 2006 for $1.8 billion.](/sites/default/files/styles/large/public/52%20Chicago%20Skyway.jpg?itok=T5kIGmKj)
Chicago Skyway
Pope Field Control Tower
![The air traffic control tower at the John F. Kennedy International Airport.](/sites/default/files/styles/large/public/54%20JFK%20International%20Airport%20Air%20Traffic%20Control.jpg?itok=jbx8cNRe)
John F. Kennedy International Airport Air Traffic Control Tower
![President Barack Obama announced a $28 billion infrastructure plan in 2009 at the start of the Great Recession.](/sites/default/files/styles/large/public/55%20President%20Barack%20Obama.jpg?itok=HkJ4u69F)
President Barack Obama