Battlefield robots are increasingly common among the world's armies — there are plenty serving in Iraq, for instance — so remote tanks and machine guns are not exactly new. But the DIY aspect takes it to a new level. Some of the Libyan rebels are engineers by training, happy to lend their skills to the liberation effort. But others are simply garage tinkerers — like chief weapons engineer Rajab, a former truck driver. In the Al Jazeera video below, he explains how to salvage found munitions and forge new ones.