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Mark Pennell sits at the helm of his time machine.Mark's Almanac is a 90-second time travel that highlights the world's history from the very serious to the sometimes sublime.

Mark's Almanac for October 29, 2021

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DOUGLAS GRAHAM
/
LIBRARY OF CONGRESS
NASA Administrator Daniel Goldin during a news conference to announce the return to the space program of Sen. John Glenn.

It was on this date in 1942 that the Alaska Highway was completed. The 1,600-mile highway was completed in just eight months. And it was on this date in 1998 that John Glenn made his return into orbit on the space shuttle.