Rescue workers discovered a body Wednesday in the rubble of a parking garage destroyed by a weekend car bombing at Madrid’s airport, confirming the first fatality blamed on the Basque separatist group ETA in more than three years. Though ETA has not claimed responsibility for the attack, a caller who warned authorities before the explosion said he represented the group. The government has accused ETA and even a senior member of the group’s outlawed political wing, Batasuna, demanded Wednesday that ETA explain the reason behind the attack. Full Story