A Florida man who flew a gyrocopter through some of America's most restricted airspace before landing at the U.S. Capitol has pleaded not guilty to the six charges he faces.

Douglas Hughes appeared Thursday in federal court in Washington. The U.S. Attorney's Office for the District of Columbia announced Wednesday that a grand jury had indicted him on charges that carry up to 9 1/2 years in prison.

Hughes, who took off from Gettysburg, Pennsylvania, was arrested April 15 after he landed on the Capitol's West Lawn in his bare-bones aircraft. Hughes has said he wanted to call attention to the influence of big money in politics

His next court appearance is scheduled for May 27.