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Category: military – Page 193

A new look at 2017 test data reveals an explosion 16 times as powerful than the one that leveled Hiroshima.

Scientists looking anew at a 2017 North Korean nuclear test discovered that the explosion was likely about two-thirds more powerful than U.S. officials previously thought.

Earlier data put the yield somewhere between 30 and 300 kilotons; the U.S. intelligence community said 140 kilotons. That was already the most powerful device tested by North Korea, topping a 2016 test by about an order of magnitude. But a new look at seismological data suggests that the blast was between 148 and 328 kilotons, and probably around 250 kilotons.

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Circa 2018

In 1963, L. Herwig proposed the nuclear pumped laser, based on the idea that the ions produced from nuclear reactions can be used as a driver for the laser medium. Since high power and high efficiency lasers with short wavelengths require high pumping power densities, nuclear pumping is an extremely appealing method. Nuclear pumped lasers could therefore direct significant amounts of energy emitted in a nuclear explosion into a very narrowly collimated beam. This beam would not only be able to destroy or damage targets from very long ranges, but also preclude subsequent use due to its own self-damaging mechanism to the initial weapon. [1] This system would ultimately constitute “a ‘third generation’ of nuclear weapons, the first two generations being the atomic (fission) and the hydrogen (fusion) bombs,” according to Edward Teller, also known as “the father of the hydrogen bomb”. [2] In this sense, it would be able to target energy toward specific targets instead of spreading energy into all directions.

Strategic Defense Initiative

On March 23, 1983, President Reagan announced plans to build a defensive Anti Ballistic Missile (ABM) system to protect against a potential intercontinental ballistic missile attack on the United States (Fig. 1). The Strategic Defense Initiative (SDI) program outlines a multilayered defense system. The first line of this defense aimed to destroy missiles in their boost phase just after launch, with a candidate for this first line being the nuclear-explosion-pumped X-ray laser. [2].

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In 1948 Frank Wisner was appointed director of the Office of Special Projects. Soon afterwards it was renamed the Office of Policy Coordination (OPC). This became the espionage and counter-intelligence branch of the Central Intelligence Agency. Wisner was told to create an organization that concentrated on “propaganda, economic warfare; preventive direct action, including sabotage, anti-sabotage, demolition and evacuation measures; subversion against hostile states, including assistance to underground resistance groups, and support of indigenous anti-Communist elements in threatened countries of the free world.”

Later that year Wisner established Mockingbird, a program to influence the domestic American media. Wisner recruited Philip Graham (Washington Post) to run the project within the industry. Graham himself recruited others who had worked for military intelligence during the war. This included James Truitt, Russell Wiggins, Phil Geyelin, John Hayes and Alan Barth. Others like Stewart Alsop, Joseph Alsop and James Reston, were recruited from within the Georgetown Set. According to Deborah Davis, the author of Katharine the Great (1979) : “By the early 1950s, Wisner ‘owned’ respected members of the New York Times, Newsweek, CBS and other communications vehicles.”

In 1951 Allen W. Dulles persuaded Cord Meyer to join the CIA. However, there is evidence that he was recruited several years earlier and had been spying on the liberal organizations he had been a member of in the later 1940s. According to Deborah Davis, Meyer became Mockingbird’s “principal operative”.

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Researchers have developed a new way to use lasers to see around corners that beats the previous technique on resolution and scanning speed. The U.S. military is interested for obvious reasons, and NASA wants to use it to image caves. The technique might one day also let rescue workers peer into earthquake-damaged buildings and help self-driving cars navigate tricky intersections.

Researchers from Rice, Stanford, Princeton, and Southern Methodist University have developed a new way to use lasers to see around corners that beats the previous technique on resolution and scanning speed. The findings appear today in the journal Optica.

The U.S. military—which funded the work through DARPA grants—is interested for obvious reasons, and NASA wants to use it to image caves, perhaps doing so from orbit. The technique might one day also let rescue workers peer into earthquake-damaged buildings and help self-driving cars navigate tricky intersections.

One day. Right now it’s a science project, and any application is years away.

Continue reading “Seeing Around the Corner With Lasers—and Speckle” | >