How many people work on those floors, most rescue copters can only carry a few people at a time. If you have a shortage of choppers then your moving to slow if you lose control of the fire. If you have plenty of choppers then you may interfere with ground ops with all the trash the choppers will stir up, not to mention the down draft may actuall fan the fire under the proper conditions like a broke window.
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Depend on yourself, help those who are not able, and teach those that are.