According to the ATF web site, the AOW definition only bans smoothbore pistols is they are designed or redesigned to fire shotgun shells:

If you can't tell the author's stance on gun control issues based on an article about new technology being used to manufacture guns, and issues surrounding it, that's excellent. It means the article is informing you with facts so you can form your own opinion, rather than trying to cram someone else's opinion into the…

According to Defense Distributed's web site, the files for the Liberator have been removed at the request of the US Government. The file is not the gun - it's the blueprint someone can use to make the gun.

"Powered by Subaru's EX21 electric start 4 stroke engine"

What impact will disrupting the natural thermocline have on sea life?

For those who missed out on completing the Pioneering merit badge during a youth in scouting, tying a knot significantly decreases breaking strength (different than toughness as noted in the article).