Between the massive cranes, construction projects and the hubbub of activity, it's hard to miss Des Moines International Airport. But, just in case, the airport is erecting a sign with 20-foot-tall ...

Another issue, he added, is its size: “Whenever someone says it’s something, everyone else’s hackles get up: ‘How could you have a lichen 20 feet tall?’” “A 20-foot-tall fungus doesn ...

But, just in case, the airport is erecting a sign with 20-foot-tall letters representing its assigned airport code: DSM. They began hoisting the letters into place on the side of its parking ...