[IMGCAP(1)] You can view this collection of containers from North America, South America and Central America at one of the museums bordering the National Mall. Can you say which museum? Check back next week for the answer. [IMGCAP(2)] Last week we challenged you to place the buildings covered by a rainbow that — if you believe the Irish legend — may have had a much different sort of container at the end. The rainbow arched over the 100 block of Massachusetts Avenue Northwest after rain showers moved through Capitol Hill.