(BLOOMBERG) Ramzi Yousef, the convicted mastermind of the 1993 World Trade Center bombing serving a prison term of life plus 240 years, asked an appeals court to lift restrictions on his contact with the outside world.

Yousef has been under so-called special administrative measures, or SAMs, in the maximum-security federal prison in Florence, Colorado, since 1998, his lawyer said. Other prisoners there include Theodore Kaczynski, the Unabomber; and Terry Nichols, convicted in the 1995 Oklahoma City bombing.

Yousef, 44, is barred from having physical contact with other inmates, and his communications with anyone outside the prison are severely restricted, his attorney, Bernard V. Kleinman, said yesterday in a court hearing. The lawyer is challenging the government’s decision to re-impose the measures annually without explanation.

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