A former CIA officer has warned that a US shift is leaving gaps as al-Qaida regroups in Afghanistan. This warning comes as the world marks a significant anniversary. Twenty-five years ago, 19 al-Qaida hijackers carried out a devastating attack, turning four commercial airliners into weapons and killing nearly 3,000 people.

The attack, which occurred on September 11, had a profound impact. Further details about the former CIA officer's warning and the current situation are available from the source.

The anniversary serves as a reminder of the ongoing threat posed by al-Qaida, and the need for continued vigilance and awareness.