each time atha finds a mine, he praises her patiently. >> atha, come! >> thousands of times, he continues training atha to walk slowly. this dog holds cambodia's future on her shoulders. buntheng will not give up. since atha loves being in the pool, buntheng lets her swim as much as she wants. day after day, buntheng continues to train atha to walk slowly, praising only her strengths. at last, atha is becoming calmer. >> finally, it's exam day. the test is held in a field that buntheng himself has never seen. >> six dogs are taking the test. atha is the only one born in cambodia. this testing ground was created a few years ago. land mines are buried here just like in the field. four months have passed since they started training. the time has finally come. >> stand there. stand there. >> like always, buntheng pets atha to calm her down. the test begins. atha starts walking. then -- buntheng suddenly stops. >> he notices atha's impatience. but he acts as if nothing happened. and quietly sits by her side. he doesn't give any orders. ten minutes later, bun