Drug-Sniffing DogsTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video06/21/2013June 21, 2013Every year some 56 million passengers and 2.2 million tons of freight pass through Frankfurt International Airport. 1000 customs officials and 34 sniffer dogs are there to ensure that there's a minimum of contraband. We check out their work.https://p.dw.com/p/18tl1Advertisement