international terrorism religious terrorism September 11 Attacks http://id.loc.gov/authorities/subjects/sh2001000147 http://purl.bioontology.org/ontology/MESH/D047851 https://en.wikipedia.org/wiki/Category:September_11_attacks https://en.wikipedia.org/wiki/September_11_attacks https://www.wikidata.org/wiki/Q10806 HV6432.7 9/11 9/11 Terrorist Attacks A series of four coordinated terrorist attacks by the Islamist terrorist group Al-Qaeda against the United States on the morning of Tuesday, September 11, 2001. The attacks resulted in 2,977 fatalities, over 25,000 injuries, and substantial long-term health consequences, in addition to at least $10 billion in infrastructure and property damage. It is the single deadliest terrorist attack in human history Nine-Eleven Terrorist Attacks Pentagon-World Trade Center Terrorist Attacks Sept. 11 Terrorist Attacks September 11 Terror Attacks September 11 Terrorist Attacks September 11 World Trade Center Attack September 11 World Trade Center Attacks September 11 World Trade Center attacks September 11 attacks World Trade Center-Pentagon Terrorist Attacks