From a DOJ release:

WASHINGTON, D.C. – A Virginia man arrested in Saudi Arabia nearly two years ago has been returned to the United States to face charges of providing material support to al Qaeda, a designated foreign terrorist organization, the Department of Justice announced today.
Ahmed Omar Abu Ali, 23, formerly of Falls Church, Virginia, arrived in the United States late Monday from Saudi Arabia. An indictment returned by a federal grand jury in the Eastern District of Virginia was unsealed following Ali’s arrival in the United States. The six-count indictment charges Ali with: conspiracy to provide material support and resources to al Qaeda, a designated foreign terrorist organization, in violation of 18 U.S.C. Section 2339B; providing material support and resources to al Qaeda, in violation of 18 U.S.C. Section 2339B; conspiracy to provide material support to terrorists, in violation of 18 U.S.C. Section 2339A; providing material support to terrorists, in violation of 18 U.S.C. Section 2339; contribution of services to al Qaeda, in violation of 50 U.S.C. Section 1705(b) and 31 C.F.R. Section 595.204; and receipt of funds and services from al Qaeda, in violation of 50 U.S.C. Section 1705(b) and 31 C.F.R. 595.204…
…The indictment, returned by a federal grand jury on February 3, 2005 and unsealed today, alleges that in or around September 2002, Ali advised a co-conspirator whom he had met on previous travels to Medina, Saudi Arabia, of his interest in joining al Qaeda. The indictment alleges that Ali intended to become a planner of terrorist operations like Muhammad Atta and Khalid Sheik Muhammad, well-known al Qaeda terrorists associated with the September 11, 2001 attacks. The indictment further alleges that between September 2002 and June 9, 2003 – the day Ali was arrested in Saudi Arabia – that Ali and another co-conspirator discussed plans for Ali to assassinate U.S. President George W. Bush. Ali and the co-conspirator allegedly discussed two options for assassinating President Bush: an operation in which Ali would get close enough to the president to shoot him on the street; and an operation in which Ali would detonate a car bomb. Ali allegedly received a religious blessing from another co-conspirator to carry out the plan to assassinate President Bush.

Here’s the indictment.