In 2007 the famous war photographer James Nachtwey won the TED prize and gave a stunning presentation showing many of his powerful images of wars and conflicts from around the world.

In addition to the $100,000 prize the winner is allowed one wish to change the world - here is James Nachtwey’s wish: (High Definition versions available here)

For more information visit the XDR-TB website. You can also view high definition versions of both videos on the website.