Glossary of doubt: NO-PLANERS: People who claim that it wasn't an aircraft, but a missile, that hit the Pentagon on September 11 2001. Some have taken it a step further and argued that no aircraft hit the twin towers, either. What the world saw that day, these sceptics argue, was either video trickery or cruise missiles disguised through image technology as aircraft. Mihops Truthers who believe the US government "Made it happen on purpose", "it" being the destruction of September 11. Lihops A more moderate strain of truther who believe the government "Let it happen on purpose". Scholars for 9/11 Truth Started by James Fetzer, the group advocates looking at all possible explanations of what happened on September 11, no matter how improbable. Scholars for 9/11 Truth and Justice The more moderate splinter group of Scholars for 9/11 Truth, led by Steven Jones. Endorses an "evidence-based approach" to questioning the 9/11 story.