The scientist at the forefront of India's first successful nuclear test in 1974, plus how an undersea mission finally found the remains of nearly 300 migrants drowned off Italy in the 1990s; also, Der Spiegel journalists under threat in Germany, and remembering two great artists - Nigeria's Chinua Achebe and Robert Mapplethorpe.

Photo: A crater marks the site of the first Indian underground nuclear test conducted 18 May 1974 at Pokhran in the desert state of Rajasthan. (PUNJAB PHOTO/AFP/Getty Images)