It’s a tragic irony that the day before the 2010 Deepwater Horizon oil well disaster, executives from BP and the rig’s operators, Transocean, visited the platform on a “management tour” that included a number of specific safety-related purposes.

Story update 10/9/2023: This article is a corrected version. The earlier version suffered from a programming error that affected all of the PID results.

World shipping changed forever when the Panama Canal opened on Aug. 15, 1914.