American Fiber Manufacturers Association: http://www.afma.org/
Yarn Calculator: http://www.legsource.com/Yarn_Calculator.htm
Official US time: http://www.time.gov/
US Patent & Trademark Office: http://www.uspto.gov/
AeroSeek flight tracking: http://www.aeroseek.com/webtrax/
National Weather Service: http://www.nws.noaa.gov/