| http://www.w3.org/ns/prov#value | - And it warned of 'a clear worldwide trend in tunneling to protect facilities.'Since 1998, government documents state, the Pentagon and other agencies have tested bombs and explosives at the White Sands Missile Range in New Mexico against blast-hardened structures above and below ground in a program aimed specifically at terrorist tunnels and other hardened targets.Among the techniques being tested
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