he Cover Feature shows how the skill of millinery can be used to change the style of a hat and adjust it to the tastes of hat lovers with diverse preferences. Likewise, azides labeled with fluorine-18 can be easily converted into amines via the Staudinger reduction. These 18F-labeled synthons can be indirectly introduced into a wide range of substrates by various methods. This provides a flexible strategy for the development of 18F-labeled radiopharmaceuticals, useful in positron emission tomography (PET) imaging. More information can be found in the Communication by M. M. Herth et al.