June 26, 2013 -- Updated 0137 GMT (0937 HKT) A man walks by a poster with photos of four suspects in the murder of DEA agent James 'Terry' Watson on June 25. Colombia's National Police said the four suspects they arrested were part of a criminal network of thieves. The United States will request extradition of the suspects, but it has not yet done so formally, a law enforcement official said. U.S. officials have extradited and prosecuted suspects accused of killing U.S. federal agents in the past. Watson, 42, had been watching the last game of the NBA finals at a Bogota restaurant Thursday night and left in a taxi, a State Department spokesman said last week. Attorney General Eric Holder is scheduled to speak at a funeral service for Watson in Louisiana on Wednesday. June 26, 2013 -- Updated 1028 GMT (1828 HKT) South Africans fear that Nelson Mandela may not be with them much longer, writes CNN's Robyn Curnow. June 26, 2013 -- Updated 1306 GMT (2106 HKT) The pursuit of NSA leaker Edward Snowden is becoming increasingly slapstick, writes Simon Tisdall. June 26, 2013 -- Updated 0947 GMT (1747 HKT) Chat to Karen Nyberg, currently at the International Space Station orbiting the Earth. June 26, 2013 -- Updated 0855 GMT (1655 HKT) Despite tensions with the West, Iran offers travelers an invariably warm welcome. And its architectural and historic sights rank with Istanbul. June 26, 2013 -- Updated 1254 GMT (2054 HKT) Brazil had finally made it, so why did millions take to the streets? CNN's Shasta Darlington explains. June 26, 2013 -- Updated 1249 GMT (2049 HKT) June 26, 2013 -- Updated 1046 GMT (1846 HKT) Whether you've scored tickets to the Wimbledon Championships or you're watching from home, here are five athletes to look out for. June 26, 2013 -- Updated 1858 GMT (0258 HKT) Fleeing U.S. law enforcement, CNN Travel's own top secret document reveals which countries should be on Edward Snowden's list ...