More history for the day

Robert McFadden has an article in The New York Times about three guys who may, or may not, have made it off the Rock:

Fifty years ago, on the night of 11 June 1962, the three convicts were locked down as usual. Guards walking the tier outside their cells saw them at 2130 and checked on them periodically all night, looking in at the sleeping faces, hearing nothing strange. But by morning, the inmates had vanished, Houdini-like.
Guards found pillows under the bedclothes and lifelike papier-mâché heads with real hair and closed, painted eyes. Federal agents, state and local police officers, Coast Guard boats, and military helicopters joined the largest manhunt since the Lindbergh baby kidnapping in 1932, scouring the prison complex on Alcatraz Island (photo), the expanse of San Francisco Bay and the surrounding landscape of Northern California.
A crude raft made of rubber raincoats was found on a nearby island. But the fugitives were never seen again. Federal officials said they almost certainly drowned in the maelstrom of riptides, undertows, and turbulent, frigid waters of the ten-mile-wide bay, their bodies probably swept out to sea under the Golden Gate Bridge.
But for aficionados of unsolved mysteries, the fantasy that Frank Lee Morris and the brothers Clarence and John Anglin had successfully escaped from the nation’s most forbidding maximum security prison and are still alive, hiding somewhere, has been a tantalizing if remote possibility for a half-century now.
It seemed wildly improbable. The Rock, where Al Capone, Machine Gun Kelly, and other infamous criminals were held was thought to be escape-proof. In its nearly thirty years as a federal prison, from 1934 to 1963, no one is known to have made it out alive. Forty-one inmates tried. Of those, 26 were recaptured, seven were shot dead, three drowned, and two besides Morris and the Anglin brothers were never found.
Had they survived, the three men— all bank robbers serving long terms— would be in their eightie now. And, while their names are all but forgotten, their breakout has been a subject of fascination to many Americans, analyzed in countless articles, four television documentaries, a 1963 book by J. Campbell Bruce, Escape from Alcatraz, and a 1979 movie of the same name starring Clint Eastwood as Morris.
The film and television productions— including a 1993 episode of America’s Most Wanted and a 2011 National Geographic documentary, Vanished from Alcatraz— correctly portrayed Morris as the escape’s mastermind and a criminal of superior intelligence.
Federal officials said he had an IQ of 133, surpassing 98 percent of the population. Born on 1 September 1926, in Washington State, he was orphaned at eleven, sent into foster homes, convicted of theft at thirteen, and landed in reform school, where he was taught to repair shoes. He graduated to robbery and narcotics, was jailed in Florida and Georgia, and, while serving ten years for bank robbery, escaped from the Louisiana State Penitentiary. Then, captured in a burglary, he was sent to Alcatraz in 1960 for fourteen years.
The Anglins were born in Donalsonville, Georgia; John on 2 May 1930, and Clarence on 11 May 1931, two of fourteen children of impoverished farmers, Robert and Rachel Anglin. The two brothers became inept burglars and were imprisoned in Alabama, Florida, and Georgia, where they tried to escape repeatedly. Seized after a 1958 Alabama bank holdup, they were sent to the federal penitentiary in Leavenworth, Kansas, and later to Alcatraz, John with a fifteen-year sentence and Clarence with a ten-year term.
Housed on a tier near one another, Morris and the Anglins began planning the escape in late 1961. One and perhaps two other inmates were involved. The plan took months to prepare and required daring, ingenuity, careful timing, and bonds of trust. The authorities said some of the men may have known one another at the federal penitentiary in Atlanta.
Behind their row of cells was a narrow, rarely used utility corridor for heating ducts and plumbing pipes. With spoons from a mess hall and a drill improvised from a vacuum cleaner, they dug through thick concrete walls, enlarging small, grille-covered air vents to squeeze through into the utility corridor. The work was concealed with cardboard and paint, and the noise by Morris’ evening accordion playing.
Some worked while others kept a lookout. With absences timed for the guard patrols, they created a secret workshop atop their cellblock. There, they created an inflatable raft of rubber raincoats held together with thread and contact cement, plywood paddles, plastic bags crudely turned into floating devices, and dummy heads of plaster and toilet paper, made realistic with paint from prison art kits and hair clippings from the barbershop.
They stole a small accordion-like concertina from another inmate to serve as a bellows to inflate the raft. Finally, they climbed through the utility corridor and up a shaft of pipes and ducts to the roof, where they cut away most of the rivets holding a large ventilating fan and grille in place. Dabs of soap substituted for rivet heads— a little artistic touch, should anyone notice.
On the night of the escape, only one thing went wrong: Allen West, a fourth inmate who had planned to join them, had trouble opening the vent at the back of his cell— he had used cement to shore up crumbling concrete and it had hardened— and was left behind. He later gave investigators many details of the escape.
The others put their dummies to bed, retrieved the raft and other materials from atop the cellblock, and climbed the ducts to the roof, where the fan-grille escape hatch had been prepared. In clear view of a gun tower, they stole across the roof, hauling their materials with them, then descended a fifty-foot wall by sliding down a kitchen vent pipe to the ground. The wall was illuminated by a searchlight, but no one saw them.
They climbed two twelve-foot, barbed-wire perimeter fences and went to the northeast shoreline— a blind spot out of range of the searchlights and gun towers— where they inflated their raft with the concertina. It was after 2200, investigators later estimated, when they shoved off. A dense fog cloaked the bay that night, and they disappeared into it.
The next day, searchers found remnants of the raincoat raft and paddles on Angel Island, two miles north of Alcatraz and just a mile from the Tiburon headlands of Marin County, north of San Francisco. They also found a plastic bag containing personal effects of the Anglins, including a money-order receipt and names, addresses, and photos of friends and relatives. Emphasizing their belief that the escapees had drowned, officials said there had been no nearby robberies or car thefts on the night of the escape.
Alcatraz, an aging, twelve-acre prison whose crumbling concrete and deteriorated plumbing had grown increasingly expensive to maintain, was closed in 1963 and later became a tourist attraction.
Morris and the Anglin brothers were officially declared dead in 1979, when the FBI closed its books on the case. But it was reopened by the United States Marshal’s Service in 1993 after a former Alcatraz inmate, Thomas Kent, told Fox’s America’s Most Wanted that he had helped plan the breakout but had backed out because he could not swim. Kent said Clarence Anglin’s girlfriend had agreed to meet them on shore and drive them to Mexico. Officials were skeptical because Kent had been paid two thousand dollars for the interview. Nevertheless, Dave Branham, a Marshal’s Service spokesman, said: “We think there is a possibility they are alive.”
The Eastwood film implied that the escape had been successful. A 2003 MythBusters program on the Discovery Channel tested the feasibility of an escape on a raincoat raft and judged it possible. And the 2011 National Geographic program disclosed that footprints leading away from the raft had been found on Angel Island, and that, contrary to official denials, a car had been stolen nearby on the night of the escape.

The feds didn't want anyone to think the three men had succeeded, because it'd make them look bad, but Rico says he thinks they got away...