Go to Olympus, and speak to Roosevelt about SABOTAGE.
He needs a CLUE (and a microscope), so head off to the 1893 site.
Look around. Anything suspicious?
Get the broken strap, and head down to Hellas.
Grab Marcus' microscope, and teleport back to Roosevelt.
Give him the CLUE and now head to PEARY.
Say ARGYRE, and PEARY will note you need steel cannonballs to break in.