Tehran has retaliated with missiles following Israel's unprecedented attacks, which damaged Iran's main nuclear site and killed several top military commanders and nuclear scientists. Canada's former head of mission in Iran, Dennis Horak, and former ambassador to Israel, Jon Allen, discuss the implications of this escalation. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/