A convoy of Egyptian armoured vehicles head along a road in El-Arish on the Sinai Peninsula on the way to the city of Rafah near the Gaza border on August 13, 2011, in support of an operation against militants. Egyptian troops moved into a town on the Gaza border on August 13 for an anticipated operation against militants who attacked a gas pipeline to Israel and police stations, security officials said. AFP PHOTO (Photo credit should read STR/AFP/Getty Images)