International Air Navigation Conference
... that the Paris International Air Navigation Conference of 1910 was held after France became concerned about the number of foreign balloons carrying German officers that were entering their airspace?
... that the Paris <b id="mwBJg"><a href="./International_Air_Navigation_Conference" id="mwBJk" rel="mw:WikiLink" title="International Air Navigation Conference">International Air Navigation Conference</a></b> of 1910 was held after France became concerned about the number of foreign balloons carrying German officers that were entering their airspace?