IS claims truck massacre as France defends security

The Islamic State group claimed responsibility Saturday for the truck massacre in Nice, as France highlighted the "extreme difficulty" of preventing such attacks amid tough questions over security failures. Tunisian Mohamed Lahouaiej-Bouhlel, 31, on Thursday night ploughed a 19-tonne truck into a crowd of people who had been watching Bastille Day fireworks in the French Riviera city, killing 84 and injuring around 300. After crisis talks in Paris, French Defence Minister Jean-Yves Le Drian noted that IS had recently repeated calls for supporters to "directly attack the French, Americans, wherever they are and by whatever means".