Rituals of remembrance took place across the country yesterday. From Manhattan Beach to Ground Zero, from Culver City to D.C., Americans marked ten years since the terror attacks on September 11, 2001. There were honor guard ceremonies, community breakfasts for first responders, prayer services and concerts. President Barack Obama travelled to New York City then Shanksville, Pennsylvania to meet with survivors. In the evening, he spoke at the Washington National Cathedral – where, earlier in the day, the cathedral tolled its 12-ton funeral bell at the four moments when airplanes struck the North and South Towers of the World Trade Center, hit the Pentagon, and crashed in Pennsylvania. The solemnity in Washington and New York had a backdrop of heightened security in response to last week's terrorism warning. On AirTalk last Thursday and Friday, we spoke with individuals closest to the tragedy and the aftermath of 9/11. Now we want to hear from listeners. How do you feel ten years on? Does it still affect you? What do you think of how it changed the country and the world? New investigations over the last several days revealed more about what happened on the morning of 9/11 and about counterterrorism operations in the U.S. What struck you? Finally, how did you mark the anniversary yesterday, and what have the memorials meant to you?