The 11th World Gliding Championships were held in Leszno, Poland. This sleek Zephyr glider is soaring silently through the clouds, striving to be the very best glider in the world. The championships are held approximately every 2 years. Gliding was a demonstration sport at the 1936 Olympics and was to become a competition sport in the 1940 summer games in Helsinki, but since WWII it hasn't been featured. You'll love this retro glider t-shirt.