International oil and diamond companies, operating concessions awarded by the government, are growing twitchy at the threat of attack.

ECONOMIST: Angola

Concessions granted in 2004 for Stratoni, one of the Halkidiki mines that is currently operating and is near Skouries, are valid until 2026 and can be renewed twice for 25 years each time, free of charge.

NPR: Masked Intruders Raid Greek Gold Mining Company