Visiting the Pentagon Memorial, volunteering for a National Day of Service project or flying an American flag are just some of the things you can do to commemorate 9/11.

For the 11th anniversary of the attacks that shook both the world and the rooftops in Arlington County, Patch is again presenting the "Deafening Quietness" video above that features interviews with Arlington County firefighters who responded to the Pentagon on Sept. 11, 2001.

Below, you'll find links to extended 2011 interviews by Patch Editor Lauren Sausser with each firefighter.

Click the following links to watch extended videos from each of the interviews.

And thank you to our emergency responders.

• Capt. Anne Marsh recounts how first responders made sense of a chaotic situation just after the attacks.
• Lt. Gregg Karl describes the noises, the smells and the terrible scene when he arrived at the Pentagon in the late afternoon.
• Nate Hiner, a rookie with the department, talks about what it's like to work every day with firefighters who responded to the terrorist attack on the Pentagon.
• Lt. Bo Bennett remembers walking through the Pentagon, checking for structural integrity, and passing victims who had been so close to safety, but did not make it out alive.
• Lt. Byron Dixon said he has a hard time believing 10 years have passed since the attacks.