putin's war is not only destroying cities and costing human lives in ukraine, it's also ruined something so simple as human trust. everyone, it seems, is suspicious of everyone else now. as scott mcclain found out for himself. >> reporter: days after the invasion began this lviv office was setup to help ukrainians fleeing war, but not everyone who comes here is welcome. shortly after we arrived the man we're filming draws suspicion from staff. they tell us he has links to russia. police are called, documents are checked, questions are asked. more than an hour passes. the man tells us his only link to russia was a 5-year-old passport stamp. they let him go. even here in lviv, a city that is far removed from the front lines, we've had the police