History of Wire Rope in Suspension Bridges http://www.inventionfactory.com/history/RHAgen/rstory/rsfound.html
PBS Bridge Basics http://www.pbs.org/wgbh/buildingbig/bridge/basics.html
Matsuo Suspension Bridge Basics http://www.matsuo-bridge.co.jp/english/bridges/basics/suspension.shtm
PBS Bridge Challenge Activity http://www.pbs.org/wgbh/buildingbig/bridge/challenge/index.html
Verrazano-Narrows Bridge Overview http://www.mta.nyc.ny.us/bandt/html/veraz.htm
PBS Suspension Bridges http://www.pbs.org/wgbh/nova/bridge/meetsusp.html
Design an earthquake-proof bridge http://www.newbaybridge.org/classroom/engineeringfor.html