Why is it our responsibility to do anything about it? Maersk is working with the Danish foreign ministry to find out what's going on. According to the Iranians one of their courts ordered the ship seized as a result of a legal judgment against Maersk regarding some missing cargo. Link
This has nothing to do with the U.S.
“Why is it our responsibility to do anything about it?”
Its a great excuse to back out of the nuclear deal and put excruciating sanctions back on the country. But as we all know Barack Obama will do nothing.
It still has no bearing on my factual post that the Marshall Islands still fall under our sphere of influence. If we wanted an excuse to eff with Iran this is it.