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One system of tunnels that is open to the public on a regular basis, normally the first weekend in September each year, are the tunnels beneath the village of Bouzincourt. These tunnels cut into the chalk had been used to hide both villages and their cattle and then during WW1 they became a billet for troops. Spending long periods of time resting in the tunnels, British and Commonwealth soldiers covered the walls with memorials to their lost comrades and their own names and those of their units. Many of these fragile inscriptions are written in field pencil, while others are cut into the chalk.
The Function of Automation & Autonomy in Unmanned Systems Panel:
Chad Hawthrone, Principal Investigator and Autonomy Researcher of Johns Hopkins University Applied Physics Laboratory
Frank Kelley, Deputy Assistant Secretary of the Navy for Unmanned Systems (DASN U/S) of the U.S. Navy
Jean Charles Ledé, Program Manager, Tactical Technology Office of the Defense Advanced Research Project Agency (DARPA)
Corey Schumacher, Lead Integration Engineer for Autonomy for Loyal Wingman (ALW) of the U.S. Air Force
Moderator: Chris Pehrson, Vice President, Strategic Development of General Atomics Aeronautical Systems, Inc.
These are loading and unloading systems for connecting the production lines to be fully automatic production lines to save labor and increase efficiency.
Also ice and glaciation is covered here before getting to rivers. The information is still valid and useful. The sailing ship in the Iceberg picture was still in use at the time and not a look at nostalgia for the kids reading this book at that time.