The CIA agent tells Sayid that 300 pounds of C4 explosives have been stolen from an army base outside of Melbourne.

The group who went into the jungle to triangulate the signal, literally formed a large triangle on the island:
-Sayid (unable to because he was hit by Locke)
-Kate (unable to because Sawyer tells her about Jack and she takes off, is replaced by Sawyer)
-Boone (unable to because he goes to help Jack, is replaced by Shannon)
originally posted by black.rabbit at the Fuselage

(Sayid takes a large metal beam and pokes it into the sand as he explains his plan to Boone and Kate.)
SAYID: Three points of a triangle. One here on the beach. (He hands Kate an item.) Another, Kate will
position in the jungle, roughly two kilometers in. And the third, I'll take to high ground.