Which tower was attacked first?

Answer 1

twin tower 1 was first

The Left twin tower was attacked first

Edit: to be completly true.. 8 years before 9/11 the northern tower was attacked killing 6 people and injuring hundreds. However they set of 4 bombs they were not strong enough.. like the 2 airplanes. ( Al-Quida also led this attack as well)
the north tower
the first tower to get hit was the north tower
the first tower to get hit was the north towerit happened around 8:50 and about 15 minutes later, the south tower was hit at 9:03.

Answer 2

American Airlines Flight 11 hit the World Trade Center's North Tower (WTC1) at 8:46 A.M.. United Airlines Flight 175 hit the South tower (WTC2) at 9:03 A.M..