NATIONAL Geographic Channel attracted record viewership for its two-part Sept. 11 special, “Inside 9/11,” which aired Sunday and Monday night.

Sunday’s “Part One: War on America,” averaged over 2.1 million viewers – the first time the network broke the 2 million viewership mark.

Viewership numbers for Monday’s “Part Two: Zero Hour” weren’t available yesterday – but strong viewership helped the network rank first in adults 25-54 from 9 to 11 p.m.

“Inside 9/11” will be repeated this Friday and Sept. 8 (7-11 p.m.) and on Sept. 11 (1-5 p.m.).