The greatest tribute to their sacrifice is that countries who were once sworn enemies are now friends, working side by side for the peace, health and prosperity of us all.
Now, this is all really a unique situation particularly because even though the U.S. and Russia have intense geopolitical tensions here on Earth, both superpowers are working hand in hand when it comes to space exploration.
Hydropower plant design and operation must not only meet the needs of consumers for electricity but work hand in hand with agencies whose concern is for the fish and wildlife water quality and water supply.