Famous Last Words: What ----??

Questions

Which American city is served by Logan International Airport?

What type of bird is a 'Beltsville'?

What is the more popular narne of the plants belonging to the genus galanthus?

What name is given to the central single wedge-shaped block at the top of an arch, which is essentially a central voussoir?

Who, in Greek mythology, was condemned to eternally roll a stone uphill, where it continually rolled back down again?