Dave Davies

In China's Second Continent, Howard French explores the Chinese presence in 15 African countries. The relationship goes beyond economics: more than a million Chinese citizens have migrated to Africa.

PBS looks at the origins of the agency's surveillance program and the extraordinary steps top government officials took to give it legal cover and keep it hidden.

The NSA managed to penetrate the networks of the giant Chinese telecommunications firm Huawei, documents show. Journalist David Sanger says cyber-espionage is an "entirely new field of conflict."