It took a CBS News crew more than 14 hours to drive south from Turkey to Tehran, a nearly 600-mile trip made longer by checkpoints and bad roads.

The head of the Israel Defense Forces said Tuesday that “the campaign against Iran is not over” as a ceasefire between the two countries went into effect. President Donald Trump also vowed that Israel will not attack Iran and told Israel to bring its pilots home.

With questions mounting over the impact of the U.S. and Israeli onslaught on Iran’s nuclear facilities and military infrastructure, a return to hostilities could be a matter of when, not if.