Ohio University Southern will commemorate 9/11 by airing History Channel films about the worst-ever terrorist attack on American soil.

The community is invited to view the films that will be broadcast on the History Channel this Thursday as part of observance of the 13th anniversary of the tragic attacks in New York City and Washington, D.C., and the hijacked plane that crashed in Pennsylvania.

The following films will be shown in the Bowman Auditorium:

At 8 a.m. “Countdown to Ground Zero” takes a look at not only Sept. 11, 2001, but also how the day came about through dramatic stories of people whose lives converge at a moment when history turns.

At 10 a.m. “Voices from Inside the Towers” documents the many harrowing and heartbreaking stories — some never heard before — of love and loss on 9/11. This documentary uses audio records, such as recorded phone calls from people inside the World Trade Center — some of whom perished, some who survived — as they contacted family members, friends and 911 dispatchers to provide a chillingly clear mental picture.

At noon “Grounded on 9/11” details the FAA’s response to the attacks on Sept. 11, 2001, and orders all planes out of the air. U.S. and Canadian air traffic controllers face a calamity of epic proportions — how to safely reroute and land 6,500 planes carrying close to a million people. For individual air traffic controllers, the work is chaotic, intense and deceptively simple: pick a new route for each flight; radio instructions to turn; listen for pilot confirmation; hold traffic to keep airways from overcrowding. From Cleveland to Gander, Newfoundland, controllers on 9/11 searched for alternate airports to land large jets even as their traumatized colleagues stream back from break rooms after watching the attacks on TV.

At 1 p.m. “9/11 State of Emergency” tells the story of 9/11 in the words of key political and military leaders, and ordinary men and women who suddenly found themselves on the frontlines of a new kind of war. National Security Adviser Condoleezza Rice, White House Chief of Staff Andrew Card, Chair of the Joint Chiefs of Staff Dick Myers, Secretary of Defense Donald Rumsfeld and a host of other top officials take viewers deep inside the corridors of power during this dramatic day.

At 3 p.m. “The Miracle of Stairway B” is the story of how 12 firefighters, three office workers and a Port Authority cop lived through the devastating collapse of the North Tower, survived for hours under a half million tons of debris and were rescued when all hope seemed lost.

At 4 p.m. “9/11: The Days After” is from the makers of “102 Minutes That Changed America” and examines what happened following 9/11. Telling the story exclusively through archival audiovisual materials collected from more than 50 sources — footage shot by professional news media and amateurs alike — the film takes a look at what happened after the tragedy, examining the texture of life in a post-9/11 world.