The harm does not have to be economic . A group of people who use a national forest claim that the construction of a recreation area in the forest will violate federal laws. Plaintiffs say that they have in the past, and will in the future, travel abroad to visit the habitats of these species. Held , plaintiffs lack standing, because the lack of specific information about their future plans means the harm to them is not sufficiently concrete or imminent. A case may not be heard by the federal courts if it raised a live controversy at the time the complaint was filed, but events occurring after the filing have deprived the litigant of an ongoing stake in the controversy.
P is permitted to attend the law school while the case is being litigated.
By the time the case arrives at the Supreme Court for review, the plaintiff is in his final year and the university says that he will be allowed to graduate regardless of how the case is decided. Held , the case is moot. A pregnant woman, attacks the constitutionality of Texas anti-abortion law. She brings the suit as a class action, in which she is the named plaintiff and other pregnant women who want abortions are unnamed members. By the time the case reaches the Supreme Court she is no longer pregnant.