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The organization classifies a country as an enemy of the internet because "all of these countries mark themselves out not just for their capacity to censor news and information online but also for their almost systematic repression of Internet users." When the "Enemies of the Internet" list was introduced in 2006, it listed 13 countries.
From 2006 to 2012 the number of countries listed fell to 10 and then rose to 12. In 2014 the list grew to 19 with an increased emphasis on surveillance in addition to censorship. When the "Countries under surveillance" list was introduced in 2008, it listed 10 countries.
Through 2010 the Open Net Initiative had documented Internet filtering by governments in over forty countries worldwide.
You can also expand the experience with the Balsa Bridges – Getting Started Package, which includes a cool structure tester for load testing.
If you want to experiment with bridges with moving parts, students will love building a bascule bridge.
Wouldn’t that be a great question for students to explore?
(Check out the official Golden Gate Bridge website for everything you could possibly want to know about this structure and the actual reason the design was changed.) This kind of problem solving requires some fundamental bridge knowledge.
At the turn of the twentieth century, people didn’t believe it was possible to build a bridge across the Golden Gate strait.