A nuclear bomb terrorist attack on New York – the sequence of events

There are currently at least 2,000 tons of weapons-grade nuclear material stored in some 40 countries — enough to make more than 40,000 bombs approximately the size of the one that devastated Hiroshima. Stealing the material would be challenging but far from impossible. Russia stockpiles numerous bombs built before the use of electronic locks that disable the weapons in the event of tampering. Universities that handle uranium often have lax security. And insiders at military compounds sometimes steal radioactive material and sell it on the black market. Since 1993, there have been 762 known instances in which radioactive materials were lost or stolen, and more than 2,000 cases of trafficking and other criminal activities.

Once terrorists obtained the uranium, they would need only a small team of sympathetic engineers and physicists to build what is known as a gun-type nuclear bomb, like the one dropped on Hiroshima. A gun-type nuke uses traditional explosives to fire a slug of uranium through a tube directly into another chunk of uranium, fracturing huge numbers of atoms and unleashing a massive amount of energy. Compared to modern nuclear missiles, which are far more powerful and complex, constructing a crude gun-type nuke is fairly straightforward.  …..

The last step in the process — smuggling the weapon into the United States — would be even easier. A ten-kiloton bomb, which would release as much energy as 10,000 tons of TNT, would be only seven feet long and weigh about 1,000 pounds. It would be simple to transport such a device to America aboard a container ship, just another unseen object in a giant metal box among millions of other metal boxes floating on the ocean. Even a moderate amount of shielding would be enough to hide its radioactive signature from most detectors at shipping hubs. Given all the naturally radioactive items that frequently trigger false alarms — bananas, ceramics, Brazil nuts, pet deodorizers — a terrorist group could even bury the bomb in bags of Fresh Step or Tidy Cats to fool inspectors if a security sensor was tripped.

In 1946, a senator asked J. Robert Oppenheimer, the physicist who played a key role in the Manhattan Project, what instrument he would use to detect a nuclear bomb smuggled into the United States. Oppenheimer’s answer: “A screwdriver.” Amazingly, our detection systems have still not caught up to this threat: One would essentially have to open and visually inspect every single crate and container arriving on America’s shores. Once the container ship reached a port like Newark, terrorists would have no trouble loading the concealed bomb into the back of an unassuming white van and driving it through the Lincoln Tunnel directly into Times Square.

The Blast

One of the greatest misconceptions about nuclear bombs is that they annihilate everything in sight, leaving nothing but a barren flatland devoid of shape and life. In truth, the physical destruction inflicted by a nuclear explosion resembles that of a combined hurricane and firestorm of unprecedented proportion. Consider one example: A ten-kiloton nuclear bomb detonated on the ground in Times Square would explode with a white flash brighter than the sun. It would be seen for hundreds of miles, briefly blinding people as far away as Queens and Newark. In the same moment, a wave of searing heat would radiate outward from the explosion, followed by a massive fireball, the core of which would reach tens of millions of degrees, as hot as the center of the sun.

When such a bomb explodes, everyone within 100 feet of ground zero is instantaneously reduced to a spray of atoms. There are photos from Hiroshima and Nagasaki showing eerie silhouettes of people cast against a flat surface, such as a wall or floor. These are not, as is sometimes claimed, the remains of vaporized individuals, but rather a kind of morbid nuclear photograph. The heat of the nuclear explosion bleaches or darkens the background surface, except for the spot blocked by the person, leaving a corresponding outline. In some cases the heat released by the explosion will also burn the patterns of clothing onto people’s skin.

Near the center of the blast, the suffering and devastation most closely conform to the fictional apocalypse of our imaginations. This is what it would look like within a half-mile of Times Square: Few buildings would remain standing. Mountains of rubble would soar as high as 30 feet. As fires raged, smoke and ash would loft into the air. The New York Public Library’s stone guardians would be reduced to pebble and dust. Rockefeller Center would be an unrecognizable snarl of steel and concrete, its titanic statue of Prometheus — eight tons of bronze and plaster clad in gold  — completely incinerated. 

Within a half-mile radius of the blast, there would be few survivors. Those closest to the atomic bombings on Hiroshima and Nagasaki have described the horrors they witnessed: People with ripped sheets of skin hanging from their bodies; people whose brains were visible through their shattered skulls; people with holes for eyes. Sakue Shimohira watched her mother’s charred body crumble into ash as she tried to wake her. Shigeko Sasamori’s father cut off the blackened husk of skin all over her face, revealing pools of pus beneath.

As the fireball travels outward from the blast, people, buildings, and trees within a one-mile radius would be severely burned or charred. Metal, fabric, plastic, and clay would ignite, melt, or blister. The intense heat would set gas lines, fuel tanks, and power lines on fire, and an electromagnetic pulse created by the explosion would knock out most computers, cell phones, and communication towers within several miles.

Traveling much farther than the fireball, a colossal pressure wave would hurtle forth faster than the speed of sound, generating winds up to 500 miles per hour. The shock wave would demolish the flimsiest buildings and strip the walls and roofs off stronger structures, leaving only their naked and warped scaffolding. It would snap utility poles like toothpicks and rip through trees, fling people through the air, and turn brick, glass, wood, and metal into deadly projectiles. A blast in Times Square, combined with the fireball, would carve a crater 50 feet deep at the center of the explosion. The shock wave would reach a diameter of nearly 3.2 miles, shattering windows as far as Gramercy Park and the American Museum of Natural History.

All this would happen within a few seconds.

From Van to Tsunami

Five different nukes, and what they would do if unleashed on Times Square.……….http://nymag.com/daily/intelligencer/2018/06/what-a-nuclear-attack-in-new-york-would-look-like.html