Title:Dynamical Characterization of Blue Stragglers Stars in Galactic Globular Clusters Abstract: High-resolution spectra with the IMACS/Baade spectrograph of more than ~100 Blue Straggler Star (BSS) candidates has been obtained to study their dynamical characteristics and detailed chemical composition in three nearby Galactic Globular Clusters (GCs). Such data have never been taken for most of these BSS targets and in combination with precise astrometric and accurate photometric HST/ACS data available for all our targets, our complementary spectroscopy will characterize the chemo-dynamical properties of the BSS populations in these benchmark Galactic GCs. Our work attemps to correlate dynamical and chemical properties to obtain the full chemo-dynamical information that will constrain BSS formation scenarios (binary vs. merger).