ON THIS DAY- The deadliest terrorist attack in US history happened on this day in 2001. Two hijacked planes hit the north and south towers of the World Trade Center in New York City within 18 minutes of one another, with a third plane crashing into the Pentagon, and a fourth into an empty field. Close to 3,000 people died in the attack. Also on this day in 1973, President Salvador Allende of Chile, the world's first democratically-elected Marxist head of state, died in a US-backed coup led by army leaders. … On this day last year, we at Enterprise were still on our Eid break.