The assassination of John F. Kennedy, the thirty-fifth President of the United States, took place on Friday, November 22, 1963, in Dallas, Texas, USA at 12:30 p.m. CST (18:30 UTC). Kennedy was fatally wounded by gunshots while riding with his wife Jacqueline in a presidential motorcade through Dealey Plaza. The official investigation by the Warren Commission was conducted over a ten-month period, and its report was published in September 1964. The Commission concluded that the assassination was carried out solely by Lee Harvey Oswald, an employee of the Texas School Book Depository in Dealey Plaza.
A number of conspiracy theories exist with regard to the assassination of U.S. President John F. Kennedy. Such theories began to be generated soon after his death, and continue to be proposed today. Many of these theories propose a criminal conspiracy involving parties such as the Federal Reserve, the Central Intelligence Agency (CIA), the KGB, the Mafia, Federal Bureau of Investigation (FBI) director J. Edgar Hoover, Vice President Lyndon B. Johnson, Richard Nixon, Fidel Castro, George H. W. Bush, Cuban exile groups opposed to the Castro government and the military and/or government interests of the United States.
The Roswell UFO Incident involved the recovery of materials near Roswell, New Mexico, USA, in July 1947, which have since become the subject of intense speculation, rumor, questioning and research. There are widely divergent views on what actually happened, and passionate debate about what evidence can be believed. The United States military maintains that what was recovered was a top-secret research balloon that had crashed.
By the early 1990s, UFO researchers such as Friedman, William Moore, Karl Pflock, and the team of Kevin Randle and Don Schmitt had interviewed several hundred people  who had, or claimed to have had, a connection with the events at Roswell in 1947. Additionally, hundreds of documents were obtained via Freedom of Information Act requests, as were some apparently leaked by insiders, such as the disputed “Majestic 12″ documents. Their conclusions were that at least one alien craft had crashed in the Roswell vicinity, that aliens, some possibly still alive, were recovered, and that a massive cover-up of any knowledge of the incident was put in place.
Many conspiracy theories have been presented concerning the September 11, 2001 attacks, many of them claiming that President George W. Bush and/or individuals in his administration knew about the attacks beforehand and purposefully allowed them to occur because the attacks would generate public support for militarization, expansion of the police state, and other intrusive foreign and domestic policies by which they would benefit.
Proponents point to the Project for the New American Century, a conservative think tank that argues for increased American global leadership, whose former members include ex-Secretary of Defense Donald Rumsfeld, Vice President Dick Cheney and several other key Bush administration figures. An 1990 report from the group stated that “some catastrophic and catalyzing event ? like a new Pearl Harbor” would be needed to budge public opinion in their favor.