I can imagine what it took Usov and his team , his work will never be in vain, he is a brave person, if only there were more people like him. 
Ninaweza tu kufikiri kazi kubwa ambayo Usov na timu yake walifanya, kazi yake hii haitapita bure, yeye ni mtu jasiri, walau tu tungekuwa na watu wengi zaidi kama yeye.