Egypt is asking the United Nations for help because it's really upset with Ethiopia about a big dam project. This dam, called the Grand Ethiopian Renaissance Dam (GERD), is being built on the Blue Nile River, which is a major source of water for Egypt.

Here's what's happening:

The Big Dam: Ethiopia is building a massive hydroelectric dam on the Blue Nile. Once finished, it will be the biggest dam in Africa and generate a lot of electricity. But this project has been causing trouble b...