§ Claim under review · Chart
"On September 11, 2001, American Airlines Flight 11 crashed into the North Tower of the World Trade Center at 8:46 a.m., and 17 minutes later, at 9:03 a.m., United Airlines Flight 175 crashed into the South Tower."
Verdict
Accurate
Confidence
HighSummary
This post is accurate. American Airlines Flight 11 struck the North Tower of the World Trade Center at 8:46 a.m. on September 11, 2001, and United Airlines Flight 175 struck the South Tower at 9:03 a.m. Those times come from the official 9/11 Commission Report, which recorded the impacts at 8:46:40 and 9:03:11, and they are confirmed independently by NIST, the National September 11 Memorial and Museum, and the Pentagon Memorial. The only small detail worth noting is that the real gap was 16 minutes and 31 seconds, not a full 17 minutes, because "17" comes from subtracting the rounded clock times. The author of the National Geographic essay the post is promoting says this himself in the piece. The caption's claim that Port Authority told South Tower occupants there was no need to evacuate is also supported by the 9/11 Commission's findings. One minor caveat: the caption's "nearly 600 miles an hour" is the highest published estimate for Flight 175, while other analyses put it closer to 540 mph.
The readings
key figures from the evidenceofficial time Flight 175 struck South Tower
Why this verdict
Evidence
The impact times in the post match the official investigative record. The 9/11 Commission Report records that at 9:03:11, United Airlines Flight 175 struck the South Tower of the World Trade Center . Published timelines drawn directly from the Commission Report list 8:46:40 for American Airlines Flight 11 crashing into the North Tower (with a note that the N.I.S.T. report says 8:46:30) and 9:03:11 for United Airlines Flight 175 flying into the South Tower (N.I.S.T. says 9:02:59) .
The 9/11 Memorial & Museum's own commemorative guidance states that hijackers crashed American Airlines Flight 11 into floors 93 through 99 of the North Tower at 8:46 a.m., and crashed United Airlines Flight 175 into floors 77 through 85 of the South Tower at 9:03 a.m. The Pentagon Memorial timeline independently records that at 8:46 a.m. Flight 11 struck the North Tower and at 9:03 a.m. Flight 175 hit the South Tower , and the Miller Center timeline gives the same two times.
Findings
✓ What's accurate 6
- Flight 11 was American Airlines and struck the North Tower (WTC 1). Correct.
- Flight 175 was United Airlines and struck the South Tower (WTC 2). Correct.
- 8:46 a.m. and 9:03 a.m. are the standard official clock times, corroborated by the 9/11 Commission, NIST, the 9/11 Memorial & Museum, and the Pentagon Memorial.
- The order of events (North Tower first, South Tower second) is correct.
- The roughly 17-minute gap is correct to the nearest minute of clock time.
- The supporting caption claims about initial confusion and the Port Authority "no need to evacuate" announcement are supported by the 9/11 Commission's findings.
≈ What's misleading 2
- Nothing material. One minor point of precision: the actual elapsed interval was 16 minutes 31 seconds (Commission) or 16 minutes 29 seconds (NIST), not a full 17 minutes. This is an artifact of subtracting rounded clock times. The essay being promoted states the precise figure explicitly, so this is a headline simplification rather than a distortion.
- The caption's "nearly 600 miles an hour" sits at the top of the published estimate range. Lower independent analyses put Flight 175 closer to 537 to 540 mph. Presenting only the highest figure without noting the range is a mild overstatement.
? What's uncertain 2
- Nothing material to the central claim. Exact impact times to the second differ by roughly 10 to 12 seconds between the Commission and NIST reconstructions, a difference that does not affect the claim as stated.
- The "some 40 percent of the country too young to remember" figure in the caption was not independently verified in this investigation and is a secondary, uninvestigated claim.
Sources
4 of 6 linked to recordsThe 9/11 Commission Report (final report of the National Commission on Terrorist Attacks Upon the United States, 2004)
NIST NCSTAR investigation into the WTC collapses
National September 11 Memorial & Museum commemorative timeline
Miller Center (University of Virginia) 9/11 timeline
Garrett M. Graff, "The 17 Minutes That Changed America," National Geographic, Sept. 1, 2026