Hyperloop trains are interesting. Air resistance is a primary factor in super fast travel, so they pump most of the air out of the tunnel through which trains are moving. A linear motor accelerates the train, then the train coasts on a cushion of thin air for miles and miles. Every once in awhile another linear motor boosts the train's speed. The motors are powered by solar cells, so they don't use electricity from the grid. 400 to 700 MPH is fast for a train.
I'm glad that couple found their wedding rings.
I'm also glad that puppy found refuge.
May the Lord bless you.