Tech news: Earthquake uses and iPad 2

Our tech/science correspondent Peter Griffin takes a look at technology use after the Christchurch earthquake. Plus version 2 of the iPad.

Pickle Juice

Kevin Miller of North Dakota State University is onto a miracle cure for muscle cramp. Pickle juice!

China: Water and power

Jonathan Watts beams in from China where the worst drought in 60 years is threatening wheat production. It's also encouraging huge desalination plants and water diversion schemes.