September 11 attacks
The September 11 attacks (also referred to as 9/11) were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda against the United States on the morning of Tuesday, September 11, 2001. The attacks killed 2,996 people, injured over 6,000 others, and caused at least $10 billion in infrastructure and property damage. Additional people died of 9/11-related cancer and respiratory diseases in the months and years following the attacks.
Orio Palmer
The 9/11 Commission carefully analyzed the FDNY radio communications that day, and reported that the battalion chief (Palmer) was able to maintain radio communication that "worked well" with the senior chief in the lobby of the South Tower during the first fifteen minutes of his ascent. A message from a World Trade Center security official (Rick Rescorla) that the impact was on the 78th floor was relayed to Palmer, and he decided to try to take his team to that level. Beginning at 9:21 AM, Palmer was no longer able to reach the lobby command post, but his transmissions were recorded and analyzed later. He reached the 78th floor sky lobby, and his team not far behind him were able to free a group of civilians trapped in an elevator at 9:58 AM. Palmer radioed that the area was open to the 79th floor, "well into the impact zone", and reported "numerous civilian fatalities in the area". One minute later, at 9:59 AM, the South Tower collapsed, killing everyone still inside, including Palmer and NYFD Marshal Ronald Bucca.