After taking down one of Hydra's strongholds and confiscating Loki's scepter, Tony Stark decides to interface the artificial intelligence inside it to an abandoned secret planetary defense system known as Ultron. (fatguysatthemovies.com)
Today, an organization called B612 hopes to avoid future follies by building up a planetary defense system to protect Earth from asteroid collisions. (science.howstuffworks.com)
The space agency, along with astronomers from the International Asteroid Warning Network, are currently planning to use TC4 as an exercise to test out the «recovery, characterization and reporting» of a potentially hazardous object approaching Earth — it allows them to try out the planetary defense systems they have been developing over the last few years. (newsweek.com)