Cessna Aircraft has very quietly built an econo military jet named Scorpion aimed at the jobs the bigger, meaner jets can do only at great expense, such as homeland security and border patrol. It’s had its first engine test. With its straight wing, it will go slowly enough to intercept slower aircraft, but can hit 450 knots when angry. Cessna built it for AirLand, another Textron company, and used a little bit of Citation jet technology along with engines used on many business jets. It should fly in two or three weeks. It’s said to cost more than a turboprop and less than a fighter jet. It was announced at the Air Force Association convention this week.