Do modern-day walls have the same impact on countries

Not exactly, no.

Explanation:

With access to airplanes, cars, trains and other transportation people can travel around or over walls. So walls now are more of historical sites than things that keep two countries separated.

Percy is angry that his dad didn't come see him himself, but the Nereid cautions Percy not to be so judgmental. The Nereid warns Percy not to trust Hades, and tells him to follow his heart no matter what. She disappears down into the depths of the ocean. Percy, Annabeth, and Grover take a bus to West Hollywood.

Explanation: spelling is key my dude