Rana Mitter talks to Washington insider Vali Nasr about his new book 'The Dispensable Nation - American Foreign Policy in Retreat.' The reputation of Alfred Russel Wallace, co-founder with Darwin of the Theory of Natural Selection, has now regained its former lustre. Rana and guests discuss why one of Victorian Britain's greatest scientists fell into obscurity. Ibrahim El-Salahi has a major retrospective at Tate Modern and exhibition curator, Salah Hassan explains the Sudanese artist's crucial role in the evolution of the reputation of African Art. Mount Fuji has finally gained World Heritage Status - Martin Dusinberre explains its central role in Japanese culture.