11.   The machinery was installed in hardened steel cases designed to prevent them from being damaged.

12.   They are made of hardened steel in the same file shapes.

13.   They are encased in a shell of hardened steel and were likely stashed near the tail of the airplane, according to Honeywell.

14.   Hidden by banana and palm trees, five young men lean over a rickety table in a clearing, hand-filing blocks of hardened steel.