Ex-CIA director says Israel could use 'covert' operations to retaliate against Iran's drone strikes without escalating the conflict

• David Petraeus told CNN that Israel could mount a covert response against Iran's drone strikes.
• "They can pursue asymmetric attacks, cyberspace, and so forth," Petraeus said.
• Saturday's drone strikes mark the first time Iran has directly attacked Israel. 

A former CIA director says Israel could take a covert, rather than an overt, response against the Iranian drone strikes that took place on Saturday.