Digital radios help in crises

Josh Kelley, The Arizona Republic

At the touch of a button on a radio, firefighters inside a burning building can signal Mayday, and dispatchers will know the identity of the sender.

During a terrorist attack or major crisis, police officers, firefighters and federal officials can seamlessly communicate with each other and coordinate an effective response.

Emergency responders in remote locations and inside dense buildings receive radio signals that are strong and clear.