Editor’s note: All information, obtained from various news sources, was compiled before 4 p.m. Wednesday. The information may have changed.

The FBI has several people in custody for questioning about Tuesday’s terrorist attacks, as of 1 p.m. Wednesday.

Authorities are checking passenger lists for any clues as to who could have performed such acts.

The acts earlier this week brought to the minds of many scenes from the Harrison Ford/Will Smith movie “Independence Day.”

Only it was not a movie. It was reality.

A hijacked passenger aircraft flew into one 110-story World Trade Center building at 8:45 a.m. Tuesday. As reporters and onlookers watched the smoldering building, a second hijacked aircraft slammed into the second 110-story tower.

A third crashed into the Pentagon in Washington, D.C., approximately one hour after the first crash, and a fourth crashed just outside of Pittsburgh at 10:10 a.m.

Both of these planes were hijacked.

The force of the plane and subsequent collapses of the twin towers injured buildings in the surrounding area. Building seven of the World Trade Center Complex collapsed early Tuesday afternoon, and the Marriott Hotel Trade Center was near collapse.

As of press time, the death toll was unknown, but as many as 800 people were unaccounted for at the Pentagon.

At least 78 police officers are missing, and 250 fire fighters are presumed dead. As of 11:25 a.m. Wednesday, six fire fighters and three police officers were rescued from the rubble.

Airports, federal buildings and the areas surrounding these disaster areas closed for indefinite periods of time.

This is the first time in U.S. history that the entire airline system has been grounded.

Hospitals were inundated with thousands of injuries and people suffering from inhalation. Doctors and nurses were bussed in from across the eastern seaboard.

Military services are on high alert, with many units responding to calls to help search for survivors and to clean up the carnage.

Naval vessels were sent to guard the east coast, while all ports were closed.

Subways and bus systems in New York resumed services Tuesday night.

The total extent of the bombings will not be known for several days.

No nations or terrorist groups have stepped forward to take credit for the attacks, but some have denied involvement, including Osama bin Laden.