When is a no-fly zone not a no-fly zone? When it’s an airlift.

This was the Berlin Airlift of 1948-49. Post-war Germany was partitioned into sectors administered separately by the major Allied powers. The city of Berlin, buried deep in the Soviet sector of Germany, was similarly partitioned. So there were American- and British- and French-administered parts of Berlin. Access from the rest of Europe was by road, rail, or air with trains and trucks passing through a Soviet-ruled countryside. That was until the Russians decided to shut down those roads and railways in 1948, keeping Berlin from receiving both fuel and food.

The only remaining access to Berlin was by air and so the United States Air Force and the Royal Air Force flew everything into […]

Bob’s 9/11 post from 20 years ago — To a Man With a Hammer

Some things are worth reading again. For the 20th anniversary of the 9/11 terrorist attacks, here — unedited — is my column originally published September 13, 2001.

My smarter and handsomer brother was in Northern New Jersey on Tuesday looking across the water at what was for just a moment longer the single remaining tower of the World Trade Center. A cold front had passed through the night before, leaving the day startlingly clear. The carnage was easy to see even from a distance. Only the rising cloud of smoke and ash marred the sky. And then that tower, too, was gone. The magnitude of this disaster and its sister at the Pentagon in Washington is […]

Einstein’s Fridge: Who knew the history of thermodynamics was so much like high school?

Almost 50 years ago I had the misfortune to take two statistics classes at the same time. One was a required introduction to statistics and the other was econometrics. Don’t ask why I took them both — I don’t remember. But I do remember one day in the Intro to Statistics class when another student asked about this distribution plot (below).

 “What was it? What did it indicate? What could it be used for?” they asked.

“It’s nothing,” said the TA. “It’s useless.”

But I had seen that shape before, in econometrics, where they called it a split normal distribution. that was said to […]

Starlink is a global ISP built at ZERO COST to SpaceX, enabling NASA’s Artemis launch

There is lots of good news lately for SpaceX, especially NASA choosing the Hawthorne, CA-based company to build a $2.89 billion lunar lander for NASA’s Artemis Moon landing slated for 2024. Key to that single-source contract, which eliminates two competitors including Jeff Bezos’ Blue Origin, was SpaceX’s willingness to restructure payments to fit the $750 million appropriated by Congress this fiscal year for the project. Already the lowest Artemis bidder, Elon Musk’s company was willing to make the deal work for the customer, which is unusual thinking for space contractors, with many asking, Where did SpaceX get the money?

They got the money from your phone bill.

This Artemis win for SpaceX […]

10 years later Fukushima Daiichi still melts down my heart

Ten years ago this month, 22,000 Japanese citizens died in a huge tsunami that also caused the second-worst nuclear accident in history at the Fukushima Daiichi nuclear power facility. Because I know about nuclear safety, I wrote a total of four columns about the accident in the month that followed. You can read them in order here, here, here and here.

When I wrote within hours of the accident that none of the 11 reactors would ever operate again, I was the sole voice on the planet saying so out loud. Read the comments and you’ll see I took some flak for […]