Drawing disappears when zooming or orbiting

Hi Sketchup Geniuses! I have a file that keeps disappearing when my student zooms or orbits. I am attaching here. What is up with this file?
Sara for bowman.skp (122.4 KB)

Hi Michael,

There is a 3 in. long edge drawn at a huge distance from the rest of the model. I selected it and erased it. Now the box at the origin shows up normally.

Sara for bowman.skp (147.6 KB)

Thank you Dave! I appreciate the quick fix and respons!

You’re quite welcome.