The American Civil Liberties Union (ACLU) has challenged the use of National Security Letters by the FBI in court several times. These lawsuits are in various stages of hearings and appeals. In one lawsuit, Doe v. Holder, the Court of the Southern District of New York and, upon appeal, the Second Circuit Court of Appeals ruled that the NSL gag provision-which prohibits NSL recipients from informing anyone, even the person who is the subject of the NSL request, that the government has secretly requested his or her records-violates the First Amendment. Do research to document the status of this lawsuit.