How U.S. Army engineers are building a bridge in less than a day:
Step 1: Unload the bridge pieces.
Step 2: Float them together.
Step 3: Secure them.
Step 4: Use the bridge to cross a river.
U.S. engineers trained Iraqi security forces on how to build a float bridge.
The Iraqi army then used the float bridge during the liberation of Ramadi from ISIS.
So airstrikes aren't the only way the U.S. is helping Iraq.
This video includes music from Frenic / CC BY 3.0.