The Obama administration has asked some of the nation's biggest technology companies for help in the fight against terrorism as it announced steps to thwart the recruitment and radicalisation of extremists. Top administration officials met in San Jose, California, with representatives of Twitter, Apple, Facebook, and other Silicon Valley companies. In a seven-page memo sent in advance, the companies were asked for ideas on how extremist content online can be identified and removed, as well as help creating alternative messages, according to excerpts of the document obtained and described ...