Question: What is the name of an agreement signed by Canada, Mexico, and the United States, creating a trilateral trade bloc in North America similar to the European Union(EU)? 
Sentence (from "EU–US Open Skies Agreement"): The treaty disappointed European airlines as it was tilted in favour of United States airlines: while they are allowed to operate intra-EU flights, European airlines are not permitted to operate intra-US flights nor are they allowed to purchase a controlling stake in a US operator.
Relevant evidence: No