When the gates open this weekend for the Duluth Air and Aviation Expo, tighter security will be in place to ensure the safety of visitors and volunteers. “We were always enforcing security (and bag checks) but now we’re definitely adding more people,” said Jodi Grayson, one of the event’s media directors. “We changed the layout of where our entrance is to make it flow better.” The updated layout makes it harder for people to bypass security and get into the airshow grounds from elsewhere. Grayson said attendees might be in line for a bit longer than at past years’ airshows, but organizers want everyone to feel safe. Airshow officials are still unsure if attendance will be up or down from last summer’s event; this weekend marks the first time they will present the airshow in back-to-back years. Ticket sales are doing well, Grayson said this week — numbers are about where they were last year leading up to the show. “We don’t know if the same people want to come back every year,” Grayson said. “Some do and some don’t. So it may get some new people and it may turn away some people.” Airshow organizers broke the tradition of [...]