Because Amazon opened up the development of Alexa Skills to anyone with the free Alexa Skills Kit (ASK) in 2015, anyone can create an Alexa Skill. As Alexa uses Natural Language Programing (NLP), those looking to build a skill don't need to worry about complex speech recognition. The ASK tools also makes it easier for novices to work with sophisticated NLP ideas.
Note: Your Flash Briefing settings apply to all Alexa devices registered to your Amazon account, and all users in your home get access to the same Flash Briefing content. However, if you or anyone in your home has a voice profile, Flash Briefing automatically skips stories and news items you've already heard. To learn more, go to About Alexa Voice Profiles.
As of this writing, Amazon has thousands of sources for flash briefings. The sources they include can be hyper-local like your local news station. Amazon also has specific topics like tech or business, or general info. Many of these sources, like NPR, are podcasts provided by Tune-In. These briefings are audio files Alexa plays for you. Other sources like the AP news stories are read in Alexa’s voice. I wish Amazon told you which ones were audio files because her voice drones on after a while. I hope I get to change her voice like I can with Siri. Right now, you can just change the language to the English (UK) or German.