By Rob Broomby, Birmingham
2013-05-29
By Duncan Kennedy, Rome
By BBC Science reporter Matt McGrath
By Nick Bryant, Sydney
By Peter Bowes, Los Angeles
By Greg Morsbach, BBC World Service
By Will Grant, BBC News
By Rachel Harvey, Bangkok
By Jonah Fisher, South Africa 媒
By Charles Scanlon, BBC Journalist, Americas
By Jack Izzard, BBC News 媒体英语会带
By Jim Muir, BBC Correspondent, Baghdad
By Rajesh Mirchandani, California, USA
By Lee Carter, Toronto
By Dominic Hughes, Brussels