Infiltrating

In "The Trojan Horse" by Virgil, Greece used a trojan horse to infiltrate the city of Troy. Many things like this happen today. From the trojan horse that screws up emails to the CIA. Are nation uses and used many spies to get inside other countries databases. We wanted to know what other countries were and are planning so we could find a way to stop or beat them to it. Take the movie Argo for example. They sent in Ben Affleck to help get the people from America out. He need to infiltrate the country and fake a Canadian movie to get in. It takes skill and luck to get an infiltration working and the Greeks and Americans have that.