In 1943, a strange experiment with an invisibility cloak on the naval battleship Eldridge allegedly resulted in its crew being sucked into a vortex. Watch more: https://cs-link.gaia.com/3nTtSO4 | Unexplained on Gaia

3K views · 111 reactions | World Stage (1872 - 1899) - Philadelphia: The Great Experiment. This video documentary is produced by Civic Entrepreneur Sam Katz and his team at History Making Productions here in Philadelphia. Sam Katz is a fan of this Facebook page. For free educational materials, visit their website at www.historymakingproductions.com/philadelphia-the-great-experiment | Old Images of Philadelphia | Facebook

6.2K views · 155 reactions | The Fight (1965-1978) - Philadelphia:...

5K views · 180 reactions | Promise for a Better City (1944-1964) - Philadelphia The Great Experiment. Sam Katz and the producers at History Making Productions have given me exclusive permission to post this documentary to my Old Images of Philadelphia page. They will also inform me of any new upcoming episodes. ~ Carl Manley | Old Images of Philadelphia | Facebook