Likelihood?

Isn't there a strong probability that a solar powered aircraft had crossed a national boundary before? E.g., "In 1980, Solar Challenger crossed from France to England. http://www.nasa.gov/centers/dryden/news/FactSheets/FS-054-DFRC.html " from Talk:Solar-powered airplane makes first international flight#First? 99.39.5.103 (talk) 05:49, 16 May 2011 (UTC)