What it does
A plain-language summary is coming. Here is the official summary from the Congressional Research Service:
Dustoff Crews of the Vietnam War Congressional Gold Medal Act This act provides for the award of a single Congressional Gold Medal to Dustoff crews (helicopter air ambulance crews) of the Vietnam War in recognition of their heroic military service.
How Congress voted
This law passed by voice vote or unanimous consent, so there is no record of how individual members voted.