Fisher-Mill Plain — Two Union High School freshmen impressed people with their scientific minds at the White House Science Fair, hosted by President Barack Obama this past month. Sydney Wallace, 13, and Austin Jang, 14, traveled in late April to Washington, D.C., to join nearly 100 other young scientists, mathematicians and engineers who were invited from across the country. Last year, Wallace and Jang were on Shahala Middle School’s championship Science Bowl team, which they represented at the White House. Wallace’s award-winning, lithium-ion-powered model car — dubbed “Danger Kitty” — was also exhibited at the April 22 fair. “When students excel in math and science, they help America compete for the jobs and industries of the future,” Obama said in a press release.