https://crsreports.congress.gov https://www.britishairways.com/en-us/information/about-ba/history-andheritage/celebrating-concorde https://www.lockheedmartin.com/en-us/news/ https://www.britishairways.com/en-us/information/about-ba/history-andheritage/celebrating-concorde https://www.bankofengland.co.uk/monetary-policy/inflation/inflation-calculator https://data.oecd.org/conversion/ https://www.bankofengland.co.uk/monetary-policy/ https://data.oecd.org/conversion/exchange-rates.htm https://www.netjets.com/ https://www.flexjet.com/ https://boomsupersonic.com/airliner https://boomsupersonic.com/xb-1 https://boomsupersonic.com/ https://boomsupersonic.com/news/show/ourpartnership-with-japan-airlines https://www.aerionsupersonic.com/ http://www.spikeaerospace.com/ http://www.japaneselawtranslation.go.jp/law/detail_main?re https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:32014R0598 https://ec.europa.eu/inea/en/horizon-2020/projects/h2020-transport/aviation/ https://www.icao.int/ https://fican1.files.wordpress.com/2018/04/fican_research_review_2018.pdf https://www.aerionsupersonic.com/as2-mission-planning/ http://www.spikeaerospace.com/s-512-supersonic-jet/quiet-supersonic-flight/ https://boomsupersonic.com/contact#faq-section https://www.nasa.gov/topics/aeronautics/features/sonic_boom_thump.html https://www.faa.gov/news/ https://scholar.smu.edu/jalc/vol43/iss4/6 https://scholar.smu.edu/jalc/vol43/iss4/4 https://www.icao.int/environmentalprotection/Pages/Reduction-of-Noise-at-Source.aspx https://www.icao.int/Meetings/EnvironmentalWorkshops/ https://www.mercatus.org/system/files/ http://aviationweek.com/commercial-aviation/noise-and-emissions-arecentral-issues-resurgent-supersonics https://www.faa.gov/about/office_org/headquarters_offices/apl/ https://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201810&RIN=2120-AL29 https://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201810&RIN=2120-AL30 https://www.faa.gov/news/fact_sheets/news_story.cfm?newsId=22754 http://aviationweek.com/commercial-aviation/noise-and-emissions-arecentral-issues-resurgent-supersonics https://www.reuters.com/article/us-airplane-supersonic-usa-exclusive/exclusive-u-s-andeurope-clash-over-global-supersonic-jet-noise-standards-idUSKBN1K21YQ