NEW : Suspect initially wanted to stage attack on September 11 , authorities say . The suspect was arrested in a parking lot near the World Trade Center after he allegedly told police that he had been inspired by al Qaeda and planned an attack, officials said. Hosam Maher Husein Smadi said through his lawyer that he understood the charges Friday . Teen accused in Texas bomb plot wrote violent posts on extremist Web site . Hosam Maher Husein Smadi accused of plotting to bomb Dallas skyscraper . Smadi told plans to undercover FBI agents , authorities say .
NEW : Suspect initially wanted to stage attack on September 11 , authorities say . The suspect was arrested in a parking lot near the World Trade Center after he allegedly told police that he had been inspired by al Qaeda and planned an attack, officials said. Teen accused in Texas bomb plot wrote violent posts on extremist Web site . Hosam Maher Husein Smadi accused of plotting to bomb Dallas skyscraper . Smadi told plans to undercover FBI agents , authorities say .