A lot of beaches, particularly on the east coast and Gulf states, are not permanent fixtures. Coastlines are very dynamic (ever-changing), and rising seas over time can wash much of that sand away. However, sometimes, sand can be washed away much more quickly when a large storm wreaks havoc on a coastline. Hurricane Sandy did just that to the East Coast a handful of years ago. Rebuilding from Sandy has been taking place at a very fast rate along the eastern seaboard, but this hurricane did take it's share of sand away, particularly from Coney Island. How does that sand come back