Video shows security team fend off armed heist in South Africa

Footage from inside a cash-in-transit van shows how a security team responded to an attempted heist by robbers wielding AK-47s in South Africa. CNN’s David McKenzie reports.Footage from inside a cash-in-transit van shows how a security team responded to an attempted heist by robbers wielding AK-47s in South Africa. CNN’s David McKenzie reports.