Virtual reality technology is allowing travelers to explore foreign cities and landmarks from home, as demonstrated by Marriott hotels' "VRoom Service". Apps are also enabling travelers to complete tasks like room service orders without human interaction. Google is developing Project Fi to provide mobile network services for $20/month to address travelers' connectivity needs. Drones are increasing in popularity for photography and may soon transport people, as a Chinese company demonstrated a human-carrying drone. The US is testing an app to streamline passport control into the country.