Mercury Missions - 6 flights with 6 astronauts - NASA's website about these flights
Space.com Mercury webpage - Interesting images (scroll down)
Gemini Missions - NASA's website about Gemini - These 2 man flights tested astrounauts' ability to be in space for prolonged perods of time and to maneuver spacecraft during flight
Space.com's Gemini webpage
13 Things That Saved Apollo 13 ******* 13 More Things That Saved Apollo 13
NPR- Marking the 45th Anniversary of NASA's "Successful Failure"
CBS Special News Report on Apollo 13's Accident
The National Air & Space Museum's Apollo Site - easy to navigate site with a lot of information about the Apollo Program
SpaceLog - a comprehensive account of Apollo 13 with pictures, transcripts and a great map of events (under Phases)
The Lunar and Plaentary Institute's Apollo Site - information about the science objectives for each mission, pictures, experiments, landing sites, etc
Apollo Lunar Surface Journal - a collection of photos, videos, reports, 1st hand reports and other things from Nasa's archive
Panorama Views of Apollo - Ever wonder what it looked like on the moon? 360 panorama views of the missions on the moon with audio.
2012 picture of the Apollo 11 landing site - Article from Space.com about the picture taken by the Lunar Reconnaissance Orbiter (LRO), a satellite that is orbiting the moon.
Apollo - The Apollo site from Nasa's archive on manned missions
The Apollo Program - From Nasa's History Division - collection of links all about Apollo.
Kennedy's speech to Congress May 25, 1961 Kennedy's speech at Rice University Sept 12, 1962
Apollo Expeditions to the Moon - online book that goes through events leading up to Apollo and the lunar landings
Space.com's article about Skylab - Picture of what is what like inside
Space.com's Infographic about how Skylab worked
History Channel's discussion of 'The Day Skylab Crashed to Earth'
Science done on Skylab
Space Shuttle Missions - STS - Space Transportation System
NASA's webpage for the Shuttle missions
National Geographic's 3 minute video on the history of the Space Shuttle
NewScientist's article on the Space Shuttle program
Nature's special section as the last shuttle lands back on Earth; lots of information
The Space Society's archive of Space Shuttle videos, narrated by astronauts
NY Times headline & article about Challenger's explosion on launch
Challenger's accident explained on Space.com
LA Times article about Nobel Prize winner Richard Feynman's role on the investigating committee
Columbia's accident on its return to Earth explained - clear images, diagrams
Nova TV show on the Columbia accident
Reporter's remembrance of the Columbia shuttle breakup
MIT's OpenCouse lecture on Space Shuttle Lecture by a professor that was on the investigative board
The International Space Station (ISS)
Spot the Station - Find out when you can see the ISS in the sky above your location
Where is the ISS from the European Space Agency (ESA)
Space.com's article about the ISS
The Atlantic's article about the ISS - 5,200 Days in Space - Interesting article
Boeing's website - This company has had a lot to do with the building and maintaining of the ISS
Take a Tour inside the ISS - A tour on the inside of the International Space Station - ISS with expedition 18 Commander Mike Fincke on youtube
Make a call to the ISS - It happens all the time!!
The ISS on Twitter - actually, there are several accounts you can follow on twitter and instagram (@ISS_Research, @NASA_Astronauts, @StationCDRKelly, @iss, to name a few)
The Future of Manned Spaceflight
NASA's webpage on Expanding Human Presence into the Solar System
NASA's webpage on Manned Missions
Article on NASA's plans to send people back to the Moon
Moon to Mars Project
Article - Who will have the first successful manned mission to Mars?
SpaceX - The most recent contractor to NASA
Article about SpaceX plans to fly astronuats by June 2019