Chennai, Nov 28 At least 70 people were killed and thousands rendered homeless in incessant rains in the state as cyclone Nisha that has crossed the Tamil Nadu coast near Karaikal left behind a trail of destruction. The cyclone, which crossed the Tamil Nadu coast near Karaikal yesterday, wreaked havoc there and in Nagapattinam, Cuddalore and Tiruvarur district, Met office said.Several fishing boats anchored near the shore in these areas broke free of its moorings and are reported missing. Standing...