Recently declassified photographs taken by U2 spy planes in the 1950s and 1960s provide an important new source of historical aerial imagery useful for Eurasian archaeology.

https://www.cambridge.org/core/journals/advances-in-archaeological-practice/article/near-eastern-landscapes-and-declassified-u2-aerial-imagery/A16A04FB4990B74B9FF750DCCF31A141/core-reader