Unmanned aerial vehicles have soared the skies of Afghanistan and Iraq for years, spotting enemy encampments, protecting military bases, and even launching missile attacks against suspected terrorists.

Now UAVs may be landing in the United States.

A House of Representatives panel on Wednesday heard testimony from police agencies that envision using UAVs for everything from border security to domestic surveillance high above American cities. Private companies also hope to use UAVs for tasks such as aerial photography and pipeline monitoring.