Lawmakers question FirstNet's funding

“There are a great number of unknowns and challenges going forward about how the network will develop and whether it will be actually sustainable over time,” Mark Goldstein, a director at the Government Accountability Office, told the House Homeland Security Subcommittee on Emergency Preparedness, Response and Communications about the FirstNet system.

The First Responder Network Authority, known as FirstNet, is a planned broadband system intended to be used by first responders to help them communicate during emergencies such as natural disasters or terror attacks. Lawmakers pressed witnesses on FirstNet's development.