Offices of US biotech giant Illumina and fashion group PVH Corp. in Bejing after China announced the addition of Illumina and PVH Corp. -- which owns Tommy Hilfiger and Calvin Klein -- to a list of "unreliable entities". This comes as China said it would impose tariffs on imports of US energy, vehicles and equipment, firing a return salvo in an escalating trade war between the world's two biggest economies. IMAGES