In 2001 that was a Tuesday, at least in the US schools typically start around 8 AM and hence yes school was in session during this time period.
September 11, 2001 was a Tuesday.
The twin towers collapsed on September 11, 2001.
The September 11 attacks occurred on September 11, 2001. http://911billofrights.blogspot.com
11 September 2001 occur
They were destroyed on September 11, 2001: 9-11-01.
Tuesday was the day of September 11 in 2001.
September 11 2001
The 9/11 attacks were on September 11, 2001.
Tuesday, September 11, 2001 was the day of the attacks.
september 11th, 2001
September 9, 2001
September 11 2001 was a Tuesday.