JERUSALEM — Israel's Mossad secret service agency killed a Palestinian wanted for airplane hijackings by feeding him poisoned Belgian chocolate over six months in the late 1970s, according to a new book, the author said Saturday. The book, "Striking Back," is apparently the first time that details of the killing have come to light. In the book, Jerusalem's Time magazine correspondent Aaron Klein describes how Israel tracked down Wadia Haddad, an operative of the Popular Front for the Liberation of Palestine, in Baghdad. Haddad had gone into hiding in the Iraqi capital after Israel began killing Palestinian militants around the...