9/11 Primary Sources: Reliability & Corroboration

Primary Source Packet: 9/11 (Reliability & Corroboration)

How to use this packet (classwork / group work):

1. Read Sources 1–6.

2. For each source, assign a reliability score 1–5 (1 = low, 5 = high) for each lens:

   • Proximity (how close in time/place to the event?)

   • Purpose & audience (why was it created, and for whom?)

   • Evidence & corroboration (what evidence is shown or referenced? can it be cross-checked?)

   • Limits/uncertainty (what could this source not know?)

3. In your group, pick one claim and trace how it could move from eyewitness → media report → official statement → later investigation.

Source 1 — Official statement (day-of)

Type: Prepared press briefing Who: Karen Hughes, Counselor to the President When: September 11, 2001 Excerpt: “I’m here to update you all on the activities of the federal government in response to this morning’s attacks…”

Source 2 — Breaking-news / contemporaneous media (day-of)

Type: Radio transcript (live broadcast notes) Who: WNYC on-air broadcast transcript When: September 11, 2001 Excerpt: “We have an eyewitness… at the World Trade Center… ‘I saw the airliner.’”

Source 3 — Oral history (eyewitness, verifiable project)

Type: Interview transcript (oral history) Who: Dawn Knipe (Pace University 9/11 Oral History Project) When recorded: After 9/11 (project transcript) Excerpt: “…when we turned that corner… the flames were coming out of the building… the sky was filled with papers…”

Source 4 — Official testimony correcting misreports (days after)

Type: Congressional testimony (prepared statement) Who: FBI testimony (Penttbom) When: October 3, 2001 Excerpt: “One… difficulty… is the plethora of news article accounts—some accurate… and some not accurate at all.”

Source 5 — Specific example of a media misreport (days after)

Type: Congressional testimony (prepared statement) Who: FBI testimony (Penttbom) When: October 3, 2001 Excerpt: “Reports… detained… wearing Delta Airlines pilots’ uniforms… box cutters. These reports were untrue.”

Source 6 — Later investigation (methods/corroboration)

Type: Investigative report notes on sourcing Who: National Commission on Terrorist Attacks Upon the United States (9/11 Commission) When: 2004 Excerpt: “Dozens of government agencies… provided… more than 2.5 million pages… including more than 1,000 hours of audiotapes.”

Teacher note (optional): If you want students to do corroboration, assign each group one source to verify by locating the full transcript and recording: (a) where it was published, (b) the date, (c) what else confirms/contradicts it.