  We have recently derived a family of extinction laws for 30 Doradus that
provides better fits to the optical photometry of obscured stars in the Galaxy
and the LMC. Simultaneously, we are extending our Galactic O-Star Spectroscopic
Survey (GOSSS) to fainter, more extinguished stars to obtain accurate spectral
types for massive stars with more than 6 magnitudes of $V$-band extinction. I
have combined both lines of research with 2MASS, WISE, and Spitzer photometry
to obtain the 1-10 micron extinction law for O stars in the solar neighborhood.
I present these results and compare them with the extinction laws in the same
wavelength range derived from late-type stars and H II regions. I also discuss
plans to extend the newly derived optical-IR extinction laws to the UV.
