FRANKFURT AM MAIN, Germany (AFP) — An assailant has stabbed to death the son of former German president Richard von Weizsaecker in attack at a Berlin hospital that left one other person seriously injured, police said Wednesday. The motive for the attack on Fritz von Weizsaecker, 59, on Tuesday evening was unclear. Von Weizsaecker, a doctor, had just delivered a lecture on liver diseases at the Schlosspark hospital in the western Berlin neighbourhood of Charlottenburg […]