Travel tech news briefs: Katanox, Airbnb, Amex GBT and more

This week's travel tech briefs include: Rob Torres named chairman of Katanox; Airbnb appoints David Spielfogel as global head of public policy; HBX Group partners with Sabre to bring 250,000 properties to Sabre Mosaic Marketplace; RMS integrates with TrustYou; Amex GBT launches Egencia AI connector; Travel Tech Association opens Start-Up Summit applications; Atlas adds Volaris.