The top fire truck is a pumper the second fire truck aerial an aerial is a ladder truck that goes higher than 1feet in the air. Some aerial have a basket the basket is so firefighters can rescue people easier.
The lags on the aerial keep the truck from tipping. The mars light are the emergency lights. The ladder is on a boom. The boom is what raises the ladder up and down.
The pumper truck is to pump water through the hoses so they can put out the fire. They can control the pounds of presser of water that go through the hose. They control the pump at the pump panel. The pump panel has lots of levers and has gages to tell what the water presser that is going through the hose. The pumper usually has has lots of hose is on it. The pumper has lots of hook ups for the hoses.
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