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Just as the U.S. State Department approves wider contact with Iran and as members of Congress begin planning the first official trips in 25 years, Tehran is sponsoring a 10-day conference of major terrorist organization beginning next week.

The purpose of the conference is to discuss anti-U.S. strategy.

Among the groups headed to Iran to participate are: Hamas, Hezbollah, Islamic Jihad and al-Qaida allies Ansar Al Islam.

The conference, dubbed "Ten Days of Dawn," is designed to mark the 25th anniversary of the return to Iran from exile of the late Ayatollah Ruhollah Khomeini, who led the revolution that ousted the shah of Iran in 1979.

Officials said the conference, ordered by Iranian supreme leader Ali Khamenei, marks Iran's investment in sponsoring Islamic insurgency groups in the Middle East, Asia and South America.