US must respond to Iranian ship hijacking?

In the aftermath of Tuesday's Iranian hijacking of a Danish (corrected) ship bearing the flag of the Marshall Islands in the Strait of Hormuz, Eli Lake and Josh Rogin report the Marshall Islands has a defense treaty with the United States that bars it from taking action on its own.

When asked if his country would request that the U.S. rescue the
cargo ship from Iran, Junior Aini, the charge