  One of the most intriguing and challenging quests of current astrophysics is
to understand the physical conditions and processes responsible for production
of high-energy particles, and emission of \gamma-rays. A combination of
high-resolution Very Long Baseline Interferometry (VLBI) images with broadband
flux variability measurements is a unique way to probe the emission mechanisms
at the bases of jets. Our analysis of \gamma-ray flux variability observed by
the Fermi-LAT (Large Area Telescope) along with the parsec-scale jet kinematics
suggests that the $\gamma$-ray emission in blazar S5 0716+714 has a significant
correlation with the mm-VLBI core flux and the orientation of jet outflow on
parsec scales. These results indicate that the inner jet morphology has a tight
connection with the observed $\gamma$-ray flares. An overview of our current
understanding on high-energy radiation processes, their origin, and location is
presented here.
