Weekend Edition 12/05/2012

The pick of this week's insight, wit and analysis from BBC correspondents, journalists and writers from around the world. Introduced by Pascale Harter. Items include:

Lucy Ash tries, with difficulty, to observe the 'laws of the tundra' while living with the Nenets people of the Russian Arctic;

Justin Rowlatt detects a 'great convergence' of the global middle class from his sun lounger in Mombasa;

Claudia Hammond races some of the world's fastest schoolchildren to lessons in Kenya;

Remembering murdered Cambodian eco-activist Chut Wutty, Guy De Launey recalls his own close brush with illegal loggers;

and Lorraine Mallinder spends the night in a barn with Canadian protesters hoping to protect Innu reservations.