1934 - The federal government opens Alcatraz in San Francisco Bay to house the nation's worst criminals. Most inmates spend many hours outside in the yard and on required work details. But a few dozen are kept in "D Block," the prison’s solitary-confinement hallway. One cell in particular is called "The Hole" — a room of bare concrete except for a hole in the floor. There is no light, inmates are kept naked, and bread and water is shoved through a small hole in the door. Although most inmates only spend a few days in the hole, some spend years on D Block. Conditions are better than in The Hole — inmates have clothes and food — but they are not permitted contact with other inmates and are rarely let out of their cells. The most famous inmate on D Block is Robert Stroud, known as the "Birdman of Alcatraz,” who spends six years there. A 1962 movie about Stroud — and subsequent media reports on the conditions on D Block — made solitary confinement a fixture of the American imagination for the first time.