Movies suffer worst box-office slump in a decade By Lisa Richwine and Jill Serjeant LOS ANGELES (Reuters) - The North American box office hit a slump at the weekend, with top earner "The Possession" taking in less than $10 million and what could be the gloomiest overall haul since the aftermath of the September 11, 2001, attacks on New York and Washington. With only a couple of new releases to tempt movie fans, horror movie "The Possession" pulled in an estimated $9.5 million in the United States and Canada. That's the first time since 2008 that no film took $10 million or more at the domestic box office. Early September is historically sluggish. After blockbuster releases over the summer, Hollywood studios reserve their big films for the November and December holidays. But revenues for the three-day movie-going weekend were particularly low, with the total gross for all films expected to be $65-$68 million. If the numbers hold when final figures come in on Monday, it could make the weekend the worst since September 21-23 2001 - two weekends after 9/11 - when revenue topped out at $59.7 million. "It is pretty scary when the top movie comes in at only $9.5 million," said Paul Dergarabedian, box office analyst at Hollywood.com. This is one of the worst-grossing weekends of the last 10 years. In the summer, single movies had opening weekends bigger than this entire weekend gross," he added. However, Dergarabedian said hope was on the way next week with the next installment of the "Resident Evil" horror franchise and the re-release of Disney/Pixar's 2003 family film "Finding Nemo," this time in 3D. This weekend's lows follow a mixed summer that saw blockbusters like "The Dark Knight Rises" and "The Avengers" but a number of flops that led to a 5 percent drop in summer ticket sales in North America compared to summer 2011. But in the year to date, the domestic box office is up more than three percent in revenue compared to the same point in 2011 and currently stands at $7.7 billion, with a 2 percent increase in attendance. Among the few notable spots was the anti-President Barack Obama documentary "2016: Obama's America." It boosted its cumulative total to more than $26 million to become the second-biggest political documentary since liberal filmmaker Michael Moore's 2004 anti-war indictment, "Fahrenheit 9/11." New thriller "The Cold Light of Day" flopped with just $1.8 million. Lions Gate spokesman Paul Pflug, whose studio released the movie along with "The Possession" and "The Expendables 2," said the studio "went into the weekend with modest expectations." "The Cold Light of Day," stars Henry Cavill, Bruce Willis and Sigourney Weaver in a story about a Wall Street trader whose family is kidnapped during a sailing trip in Spain. It cost $20 million to produce. Distributor Summit Entertainment, a division of Lions Gate, reduced its risk through a co-financing arrangement with Intrepid Pictures, pre-sales of foreign rights and a production tax credit in Spain. "The Possession," about a young woman possessed by a demon and starring Kyra Sedgwick, out-sold Prohibition-era crime drama "Lawless," which took in $6 million. The only new movie to make the top 10 was romantic thriller "The Words," which earned $5 million. It stars Bradley Cooper and Zoe Saldana in the story of a writer who finds a manuscript in a 1940s briefcase and considers passing it off as his own. The film was produced for $6 million and acquired by CBS Films, a unit of CBS Corp, for $2 million. Rounding out the top five, action movie sequel "Expendables 2" grossed $4.7 million domestically. Another action sequel, "The Bourne Legacy," rung up $4.0 million. Lions Gate Entertainment released "The Possession" and "Expendables 2." "The Words" was distributed by CBS Films, a unit of CBS Corp. The privately held Weinstein Co released "Lawless." "Bourne Legacy" was distributed by Universal Pictures, a unit of Comcast Corp. Reporting By Lisa Richwine and Jill Serjeant; Editing by Eric Beech and David Brunnstrom