When has the writ end suspended?

The writ of habeas corpus can be suspended during times of national emergency or rebellion, as established by the U.S. Constitution in Article I, Section 9. Notably, President Abraham Lincoln suspended it during the Civil War to detain suspected Confederate sympathizers. Additionally, the writ was suspended in the aftermath of the September 11 attacks, allowing for the detention of individuals deemed a threat to national security. Such suspensions are typically controversial and subject to legal and ethical debates regarding civil liberties.