Presidio The heavy machinery is moving in. Barely a week after receiving a $2.6 billion federal contract for border wall construction, subcontractors for Fisher Industries have started to build a lay-down site for equipment outside of Presidio. As the sun rose on Monday morning, two subcontractors from Arizona were looking at plans and figuring out how to grade and pave an area off FM170. A rented maintainer, water truck and front-end loader s…