Good on Why Phone Networks get congested in emergencies.
Excellent interview with telecom expert Brough Turner.
http://boingboing.net/2013/04/17/why-is-it-so-hard-to-make-a-ph.html#more-224850
http://boingboing.net/2013/04/17/why-is-it-so-hard-to-make-a-ph.html#more-224850