Minneapolis-St. Paul International has become the second airport in the United States to offer blind and visually impaired travellers free access to Aira, an app system to help them navigate the building. Users wear smart glasses, the visual field of which is streamed to a sighted guide, who then gives the visually impaired user directions, enabling them to find their way around the airport. Aira usually costs $89 a month but is available at Minneapolis-St. Paul International and Memphis International Airport for free.

Find out more at the Aira website.