George Bush regrets that invading Iraq paved way for ISIS George W. Bush spoke of Iraq invasion in a two-part interview with CBS Revealed he thought it was 'right decision' to take military action in 2003 But added that his one regret was war paved way for rise of Islamic State A violent group of people have risen up again.. they need to be defeated Bush also said Saddam Hussein did not take threat of invasion seriously In recent months, ISIS has taken control of swathes of both Iraq and Syria Bush is promoting book - '41: A Portrait Of My Father' - released Tuesday George W. Bush appeared to take aim at his successor President Obama in an interview aired today - as he suggested the draw down of troops in Iraq had allowed ISIS to flourish. Speaking to CBS News in a two-part interview, the 68-year-old former president said he thought it was 'the right decision' to take military action in 2003 in a bid to oust Saddam Hussein. But he added: 'My regret is that...a violent group of people have risen up again...This is "Al-Qaeda plus..."they need to be defeated. And I hope we do...I hope the strategy works. Former president: George W. Bush (pictured speaking to CBS News in a two-part interview that will air on Sunday) has only one regret about invading Iraq - that it paved the way for the rise of the Islamic State Militant: Bush told correspondent Bob Schieffer: 'My regret is that...a violent group of people have risen up again...This is "Al-Qaeda plus..."they need to be defeated.' Above, an ISIS militant in Raqqa, Syria During the interview with Washington correspondent Bob Schieffer, Bush also revealed that when he threatened to invade Iraq, then-president Hussein did not take him seriously. You know, when he was captured... I was told that the FBI agent that talked to him, he said "I just didn't believe Bush,"' he said. 'And it's hard for me to believe he didn't believe me.' 197 shares 'In retrospect...I don't see how he could doubt my word,' Bush, who is currently promoting his new book, '41: A Portrait Of My Father', which is a biography of his father, George H.W. Bush, added. The 2003 invasion of Iraq, which spanned March 19 to May 1 that year, signaled the start of the Iraq War, which claimed the lives of nearly half a million people. Discussing the war: During the interview, the 68-year-old former president (pictured, right, with Schieffer), said he thought it was 'the right decision' to take military action in 2003 in a bid to oust Saddam Hussein After the invasion: Bush is pictured addressing the nation aboard the nuclear aircraft carrier USS Abraham Lincoln on May 1, 2003. He declared major fighting over in Iraq, calling it 'one victory in a war on terror' Former Iraqi president: During the interview with Washington correspondent Bob Schieffer, Bush also revealed that when he threatened to invade Iraq, then-president Hussein (pictured) did not take him seriously In December 2011, under the orders of President Barack Obama, all U.S. troops departed from Iraq, bringing the American mission in the war-torn country to an end. However, in the past few years, ISIS has quickly risen to power in Iraq and Syria, taking control of swathes of both countries. In June, the terror group overran Mosul, Iraq's second largest city. On Saturday, American warplanes reportedly launched a strike on a gathering of ISIS rebels in al-Qaim, Syria, critically wounding their leader, Abu Bakr al-Baghdadi. Bush's two-part interview will air on CBS News's Sunday Morning at 9am on Sunday, as well as the channel's 'Face The Nation' at 10.30am the same day. 'Critically injured': On Saturday, American warplanes reportedly launched a strike on a gathering of ISIS rebels in al-Qaim, Syria, critically wounding their leader, Abu Bakr al-Baghdadi (pictured) In the biography, Bush also reveals his father, now 90, seriously considered not running for re-election in 1992, even though he loved his job. This is because he felt his role was creating scrutiny of his son, Neil Bush, who was facing a federal lawsuit. 'It killed him to see Neil singled out because he was the President's son,' Bush wrote. The book also discusses George H.W. Bush's decision to launch the first war in Iraq in 1991, his early failures in politics and his stinging defeat to Bill Clinton in 1992. The biography is set to be released on Tuesday, November 11.