This ASP.NET MVC sample application is a part of the Rapid Response Kit, built by Twilio, used by organizations to act quickly in disastrous situations. The app allows aid workers to communicate immediately with volunteers using a conference line or broadcast a spoken message to a list of phone numbers. The application uses Twilio's C# library to generate TwiML that tells Twilio how to handle incoming voice calls. The code includes routes for creating and managing conferences, recording new messages, and broadcasting recorded messages. The app uses Twilio's REST API to initiate phone calls and play recordings.