3 ms·

Presumably there's a "breakout" burr on the outside surface of the metal which indicates that the drill bit emerged through that surface.

• jacquesm 8y ago
  That would be very hard to remove evidence.
• Phlarp 8y ago
  This only indicates that the hole was made from one side or the other-- we can't say for sure that just because the hole was drilled from the inside that it was done in orbit.