Victims and heroes commemorated two decades after 9/11; Singer Elvis Perkins remembers his mom, 20 years after her death. Source

To commemorate the 20th anniversary of his brother’s death, Frank Siller is going the distance. Source

Actor Steve Buscemi accompanied Engine 55 for five days following the attacks on September 11, 2001, helping them dig through rubble at the World Trade Center. Source

The case against the five men accused of aiding the hijackers inched forward with pre-trial hearings. In the gallery were a handful of 9/11 family members. Senior investigative correspondent Catherine Herridge reports from Guantanamo Bay, Cuba. Source

Retired Four-Star General, and former head of special operations, Raymond “Tony” Thomas, has served in Afghanistan almost every year since the September 11, 2001 attacks. Source

Elvis Perkins released his debut studio album “Ash Wednesday” in 2007, more than five years after the day that would affect him in deeply personal and profound ways. His mother, Berry Berenson-Perkins, was heading home aboard American Airlines Flight 11 when she died at the World Trade Center. On the 20th anniversary of the September 11 attacks, Perkins remembers her and talks to Anthony Mason about how she helped him become a singer. Source

Less than a month after 9/11, the United States invaded Afghanistan, where Al-Qaeda planned the attacks. The war lasted nearly 20 years and became America’s longest war and cost the lives of more than 2,200 American service members. The U.S. withdrew its final forces in August, leading to chaos. Charlie D’Agata reports from the Afghanistan-Pakistan border where people are desperate to flee. Source

One of the hijacked jetliners on 9/11 was American Airlines Flight 77. It crashed into the Pentagon, killing 59 passengers and crew on board along with 125 military and civilian personnel inside the building. Those victims will be remembered at a ceremony at the Pentagon Saturday morning. CBS News national security correspondent David Martin has the story of one survivor who helped others escape. Source

United Flight 93 was the final hijacked plane on September 11, 2001. It was the only jetliner not to make its intended target, the U.S. Capitol Building. Passengers and crew on the flight, who learned of the other hijackings, attempted to rush the cockpit and retake control from the terrorists. Instead, it crashed in a field in rural Pennsylvania, killing everyone on board. Their heroism will be remembered Saturday at a memorial in Shanksville, Pennsylvania. Nikole Killion reports. Source

Saturday marks 20 years since the September 11 terrorist attack that killed nearly 3,000 Americans and left many more with long-term health issues. A remembrance ceremony will be held at the National September 11 Memorial and Museum located at Ground Zero, the site where the Twin Towers of the World Trade Center once stood. Michael George reports from Lower Manhattan. Source