The 10/40 Window

photo source: https://www.missioninfobank.org/mib/index.php?main_page=popup_image&pID=3497 The 10/40 Window is a term coined by Christian missionary strategist and Partners International CEO Luis Bush in 1990[1] to refer to those regions of the eastern hemisphere, plus the European and African part…

Continue Reading The 10/40 Window

Airplane Tails

This morning in my reading, I learned about the T-Tail and how when the wings stall during flight, the wake created by the wing makes the t-tail become ineffective. When…

Continue Reading Airplane Tails