Just a few months ago, threats of interference causing planes to crash delayed the efforts of commercial wireless carrier’s much-anticipated rollout of 5G services on C-band spectrum they had paid $81 billion to license about a year earlier. There has been a lot of process-oriented fingerpointing about governance and coordination, but at the heart of the problem are older radio altimeters with receivers that “hear” signals outside the band in which they are supposed to operate—an issue that has arisen in other proceedings, such as GPS-related items. How should the aviation-5G dispute be resolved? How can similar disputes be avoided in the future? Should the FCC or other government agency regulate receivers as well as transmissions, particularly when shared-spectrum strategies are becoming commonplace?