Tensions in North Korea have caught the attention of the World Affairs Council in Berks County.
Earlier this week, North Korea said the agreement ending the Korean War had been nullified.
The U.N. said the agreement is still in force.
A speaker told an audience at the Inn at Reading in Wyomissing that the situation needs to be watched very closely.
"Mostly, it's a lot of saber rattling, but it is something that we need to take seriously because there comes a point when countries do threaten enough that they need to follow through in order to make their threats realizable," said Steven Hood, professor, Ursinus College.
North Korea is not likely to use nuclear force, but we could see increased military action against South Korea, Hood said.