Is the Strait of Hormuz actually open?
That's a key question as a ceasefire deal reached Wednesday has halted the Iran war for two weeks. Iran has had a chokehold on the strait, a critical passage for global oil flow.
Even with the tenuous ceasefire deal, some warn the energy infrastructure in the Middle East will take months to recover, and prices may not drop as much as hoped.
"Until oil starts flowing again, and it is not yet, and this ceasefire, as you said, is very tenuous, the market is still short," Jason Bordoff, the founding director of the Center on Global Energy Policy at Columbia University, told PBS News' @WmBrangham. "You need signals from Iran that tankers will be allowed to pass, that their military is not going to arbitrarily stop some and not others."