Babar Ahmad and Syed Talha Ahsan appeared in federal district court in New Haven today. They were remanded in custody until their trial.
Their lawyers declined to comment afterwards. If convicted, the men could face life sentences.
They are accused of running websites to recruit for the al-Qaida network, Afghanistan’s ousted Taliban regime and Chechen rebels.
They will be tried in Connecticut, where an internet service provider was allegedly used to run the websites.
The men arrived in the US early today after years-long extradition fights in England.
Three other suspects are to appear in court today in New York.