1.   These are thick concrete pads surrounded by razor wire and motion detectors, where enormous steel canisters loaded with spent fuel sit for the indefinite future.

2.   Other troops had tear gas canisters loaded on their rifles.

3.   The bombs in attacks linked to them were usually gas canisters loaded with explosives.

4.   The bombs in attacks linked to the Algerian militants were usually gas canisters loaded with explosives.