About: http://webisa.webdatacommons.org/43373934

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Air travel was a fraction of what it is now, commercial jet travel did not start until 1958, and military operations were generally limited to particular areas.
http://www.w3.org/ns/prov#wasQuotedFrom	wattsupwiththat.com