A somber anniversary is being marked today. The US is remembering a tragic event that occurred 25 years ago, resulting in significant loss of life. Nearly 3,000 people were killed in the attacks.

The aftermath of this event led to major changes in the country's security and foreign policy. Ceremonies are being held to commemorate the anniversary, with events taking place nationwide.

Further details about the commemorations and the impact of the event are available from the source, which provides a more in-depth look at the circumstances surrounding the attacks and their lasting effects.