Here's a rewritten and improved version of the provided content, expanded to meet the 500-character requirement while maintaining a natural, human-like tone:
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This is from Eric Haak:
Here are some photos from a still-and-box alarm that took place in Chicago on Saturday morning, February 11th. The 15th Battalion was the first unit on scene and reported light smoke coming from a large, four-story fire-resistive warehouse measuring 600 by 200 feet. Just seven minutes later, they reported heavy smoke inside and requested the box. It turned out to be an auto fire, not a structural one. The Mobile Ventilation Unit (MVU) was called in to help clear the smoke.
These images give a good look at the response and the firefighters in action. The first photo shows Engine 39, followed by a shot of thick smoke pouring from the building. There's also a picture of a probationary firefighter working on the scene, highlighting the dedication of new members. Another image captures a group of Chicago Firefighters at the location, and there’s a shot of Engine 65 as well. A lieutenant can be seen directing operations, and finally, the MVU 923 is shown in action. All photos were taken by Eric Haak.
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