What changed in the radio landscape in 20 years post 9/11 and Hurricane Katrina here in the US? Have you ever wondered why we have so many new P25 systems showing up in the 700 MHz band? These are the questions we are asking in today's podcast.   What You Need To Know 9/11 really brought to light some of the changes that had to happen with interoperability. Hurricane Katrina, which happened just four years later in 2005, also revealed that changes needed to happen.  Responding agencies on 9/11 had communication problems on their own two way systems. They also lacked a structured plan for communicating to other agencies in real time to alert them of urgent risks to life and health. In order to open frequencies for public safety, Congress enacted Spectrum Act 2012 This directed the Commission to allocate the D block from 758 to 763 MHz and 788 to 793 MHz to public safety for use in a nationwide broadband network. FirstNet is charged with responsibilities for deploying and operating a nationwide public safety broadband network. In February of 2006 U.S. house of representatives voted 216 to 214 and approved a budget package that required analog television broadcasters to clear the 700-megahertz airwaves. Channels 70 to 83 are now part of the mobile radio system’s public safety and trunk system. The National Interoperability Field Guide is a technical reference for multi-communication planning and for radio technicians responsible for radios that will be used in disaster response.  This is why we see so many new P25 systems showing up in the 700Mhz band   All session notes with links to the items we talked about can be found on our website at https://www.scannerschool.com/session195   ==================================== ? Free SDR Course! ====================================  Our new free course will introduce you to Software Defined Radios. "The Ultimate Beginner's Guide to Software Defined Radio: Everything you need to know to get started with SDR in an afternoon" is now open for enrollment. ? Register now at https://courses.scannerschool.com   ==================================== ? Would you like 1 on 1 help? ==================================== If you need help with your scanner and are looking for some one on one tutoring, I'd love to help you out. Visit http://www.scannerschool.com/consulting to book your one hour appointment today!   ==================================== ? Help support Scanner School ==================================== You can help support Scanner School by visiting our support page at http://www.scannerschool.com/support We have links on this page where you can purchase scanners from our affiliate partners and software from BuTel. So if you are in the market for a new scanner, accessories, or software, please use the above link to help Scanner School at no additional cost to you.   ==================================== ⚠️ I want to answer your questions ==================================== I am always looking to answer your scanner radio question. If you have a question you'd like answered, please leave me a voicemail with your question: ? 516-308-2885 ? https://www.scannerschool.com/ask   ==================================== ? Thank you Patreon Supporters ==================================== Thank you to all monthly Patreon Supporters. Supporting the podcast can be done for as little as $1 per month. Supporters at the $3 and $5 level will receive the podcast without the middle commercial break. Supporters at the $5 level not only receive the podcast early, but they also get access to discount codes, monthly zoom meetings, and Squelchy sticker packs. ? Join our Patreon program at https://www.scannerschool.com/patreon   ==================================== ? Subscribe to our growing YouTube Channel ==================================== We are live once a month on YouTube to answer your questions. 2022 will be the year of Video for Scanner School Be ready for the upcoming videos by subscribing now to our You