1. The Snake River Alliance, an Idaho-based environmental activist organization, was planning a rally in Boise on September 11, 2001, to protest against the transportation of nuclear waste through the state. The rally was cancelled in the wake of the terrorist attacks in New York City.

2. Boise airport was one of many airports in the US that was shut down in the immediate aftermath of the 9/11 attacks. It remained closed until September 13, causing widespread disruption to travel plans.

3. September 11, 2011, marked the 10th anniversary of the terrorist attacks, and several events were held in Idaho to commemorate the occasion. These included a memorial ride by the Patriot Guard motorcycle club, a benefit concert by local musicians, and a tribute ceremony featuring a piece of steel from the World Trade Center.

4. A number of Idahoans were directly affected by the 9/11 attacks. Among them were three former Mountain Home Air Force Base airmen who died in the line of duty during the subsequent war in Afghanistan.

5. In 2019, a group of Idaho National Guard soldiers were deployed to Afghanistan on September 11, marking the 18th anniversary of the attacks. The soldiers were tasked with conducting security operations and were also involved in humanitarian aid efforts in the war-torn country.