Where are you calling from? http://jillianreilly.com/information-essay/ beset essay who am i granite weary The military said it was the third tunnel found along the Gaza border fence in the past year. It estimated that 500 tons of cement and concrete were used, and the structure took more than a year to build. It said the tunnel was detected during a routine patrol, and that Hamas blew up the Gaza side of the tunnel after figuring out that Israel had detected it.