A powerful explosion caused by a car bomb caused extensive damage to Spain’s busiest airport Saturday, an airport official said, but there were no reports of casualties. The parking lot explosion followed a warning to police, who were able to evacuate Terminal 4 at Madrid’s Barajas International Airport. It was not clear who gave the warning. Police received the warning at 8:15 a.m., telling them the bomb would detonate in 45 minutes, the official said. Full Story