On this day: April 25

Published On: Apr 23 2013 05:10:32 PM CDT   Updated On: Apr 25 2014 01:00:00 AM CDT

The guillotine is first used, American and Soviet troops cut Nazi Germany in two, a U.S. Navy submarine completes the first submerged circumnavigation of the globe, and the Hubble Space Telescope is launched, all on this day.

OTD April 25 - Saint Lawrence Seaway
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Saint Lawrence Seaway Authority

1959: The Saint Lawrence Seaway, linking the North American Great Lakes and the Atlantic Ocean, officially opens to shipping. The system of locks, canals and channels permits ocean-going vessels to travel as far inland as the western end of Lake Superior. This photo shows the Frontenac icebreaker becoming the first ship to cross the St. Lambert Lock, the first lock on the seaway.

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