Ahmed Zewail, a science adviser to President Barack Obama who won the 1999 Nobel Prize for his work on the study of chemical reactions over immensely short time scales, died on Tuesday. He was 70.
Zewail's death was announced by the California (...)
A Coptic Christian priest was shot to death and at least 13 people were injured Saturday in violence in Egypt after the army's ouster of president Mohammed Morsi.
Morsi's opponents gathered in Cairo's Tahrir Square tightened checkpoints at the (...)
