One of the longest solar eclipses on Earth darkened the sky 50 years ago. Here's how it happened.

From the article:
"The maximum duration of totality — 7 minutes 04 seconds — was in the Sahara Desert, not far from where Algeria, Mali and Niger meet.
The absolute maximum duration for a total eclipse is 7 minutes 31 seconds"

I witnessed the total eclipse of July 11, 1991 from a spot on the centerline in Baja, California. Duration there was 6 minutes 47 seconds. Clear weather, it was awesome.