At least 27 people have been detained on immigration violations. The first arrest has been made officially. One person in custody on a material witness warrant. This is issued when it can be proven that they can possibly give information relating to a case and/or when there is a risk of flight (leaving the country).  

35 search warrants and hundreds of subpoenas have been issued; computers and files have been seized. A list has been released, of 19 people being connected to the hijacking, some of which are directly or indirectly linked to Osama Bin Laden. The FBI has released a list of over 100 names of people they would like to talk to in connection to the investigation.

It's believed that there are over 4,000 bodies remaining in the debris. There is no "real hope" of finding more survivors, but rescue workers are not letting up. The rubble is still smouldering. NYC says that they are not in need of any more volunteers to search the debris, and that they have shifts worked out for the workers.

Pentagon deceased updated to 189 instead the initial 190 reported.

Pentagon has planned to call up 35,000 military reserves to put into action at bases around the country, as well as providing security at the nation's ports. They will also help in the cleanup in New York and D.C. ... Volunteers will be requested first, and then reserves called in from an already chosen list. It's possible that as many as 50,000 could be called into service. (source: CNN)

Another arrest has been made of a material witness. The count is now at 2 arrests, and at least 25 detained.

Almost 5,000 missing in NYC. (4.972)

A suspected hijacker's passport has been found several blocks from the NYC crash site.

U.S. airlines are being permitted to fly to international destinations. Some international airlines are being permitted to fly into the United States.

BBC - The area of the Pentagon which was hit had recently been rebuilt & re-enforced to block terrorist attack. If the plane had hit any other area, it is speculated that the death toll would be much higher.

Operation Noble Eagle is the term being given to the military defense system put in place to secure the United States.

The NYSE, NASDAQ, and ASE successfully tested their computer systems, and will open back up on Monday morning.

Afghanistan has threatened that any country that, in the event of the U.S. attacking them, any country who provides airspace or soil to American troops will be considered an enemy to Afghanistan and may be invaded by them.

Current death toll at the WTC is 159. 89 bodies have been identified.

India has joined support for the efforts of the United States.