When we were about to leave the park, we saw some people walking towards the field, opposite the library. Was wondering what is going on. When we saw this while on the way back home, then only we remembered the Oregon Internatinal Air Show had just started. The show was at Hillsboro Airport from 19th to 21st August 2011. The skies was brought to life with performances beginning at dusk and ending the night with a spectacular finale of fireworks.