Question: Einstein@Home is a volunteer distributed computing project that searches for signals from rotating neutron stars in data from the LIGO gravitational-wave detectors, from large radio telescopes, and from the Fermi Gamma-ray Space Telescope, the Einstein@Home project director is which American physicist and director of the Max Planck Institute for Gravitational Physics in Hannover Germany? 
Context: VERITAS (Very Energetic Radiation Imaging Telescope Array System) is a major ground-based gamma-ray observatory with an array of four 12 meter optical reflectors for gamma-ray astronomy in the GeV – TeV photon energy range.  VERITAS uses the Imaging Atmospheric Cherenkov Telescope technique to observe gamma-rays that cause particle showers in Earth's upper atmosphere.  The telescope design is based on the design of the existing 10m gamma-ray telescope at the Fred Lawrence Whipple Observatory.  It consists of an array of imaging telescopes deployed such that they permit the maximum versatility and give the highest sensitivity in the 50 GeV – 50 TeV band (with sensitivity from 100 GeV to over 10 TeV).  This very high energy observatory, completed in 2007, effectively complements Fermi Gamma-ray Space Telescope due to its large collection area as well as its higher energy bound. The Bruno Rossi Prize is awarded annually by the High Energy Astrophysics division of the American Astronomical Society "for a significant contribution to High Energy Astrophysics, with particular emphasis on recent, original work".  Named after astrophysicist Bruno Rossi, the prize is awarded with a certificate and a gift of USD $500, and was first awarded in 1985 to William R. Forman and Christine Jones Forman "for pioneering work in the study of X-ray emission from early type galaxies".  It has been awarded 32 times.  In 2010, the prize was awarded to William B. Atwood, Peter Michelson and the Fermi Gamma-ray Space Telescope team "for enabling, through the development of the Large Area Telescope, new insights into neutron stars, supernova remnants, cosmic rays, binary systems, active galactic nuclei, and gamma-ray bursts".  In 2013, the prize was awarded to Roger W. Romani of Leland Stanford Junior University and Alice Harding of Goddard Space Flight Center for their work in developing the theoretical framework underpinning the many exciting pulsar results from Fermi Gamma-ray Space Telescope. GEO600 is a gravitational wave detector located near Sarstedt in the South of Hanover, Germany.  It is designed and operated by scientists from the Max Planck Institute for Gravitational Physics, Max Planck Institute of Quantum Optics and the Leibniz Universität Hannover, along with University of Glasgow, University of Birmingham and Cardiff University in the United Kingdom, and is funded by the Max Planck Society and the Science and Technology Facilities Council (STFC).  GEO600 is part of a worldwide network of gravitational wave detectors.  This instrument, and its sister interferometric detectors, when operational, are some of the most sensitive gravitational wave detectors ever designed.  They are designed to detect relative changes in distance of the order of 10, about the size of a single atom compared to the distance from the Sun to the Earth.  GEO600 is capable of detecting gravitational waves in the frequency range 50 Hz to 1.5 kHz.  Construction on the project began in 1995. Bruce Allen (born May 11, 1959) is an American physicist and director of the Max Planck Institute for Gravitational Physics in Hannover Germany and leader of the Einstein@Home project for the LIGO Scientific Collaboration.  He is also a physics professor at the University of Wisconsin–Milwaukee. MilkyWay@home is a volunteer distributed computing project in astrophysics running on the Berkeley Open Infrastructure for Network Computing (BOINC) platform.  Using spare computing power from over 38,000 computers run by over 27,000 active volunteers as of 2011 , the MilkyWay@home project aims to generate accurate three-dimensional dynamic models of stellar streams in the immediate vicinity of the Milky Way.  With SETI@home and Einstein@home, it is the third computing project of this type that has the investigation of phenomena in interstellar space as its primary purpose.  Its secondary objective is to develop and optimize algorithms for distributed computing. Einstein@Home is a volunteer distributed computing project that searches for signals from rotating neutron stars in data from the LIGO gravitational-wave detectors, from large radio telescopes, and from the Fermi Gamma-ray Space Telescope.  Neutron stars are detected by their pulsed radio and gamma-ray emission as radio and/or gamma-ray pulsars.  They also might be observable as continuous gravitational wave sources if they are rapidly rotating and non-axisymmetrically deformed.  Einstein@Home examines radio telescope data from the Arecibo Observatory and has in the past analysed data from Parkes Observatory, searching for radio pulsars.  The project also analyses data from the Fermi Gamma-ray Space Telescope to discover gamma-ray pulsars.  The project runs on the Berkeley Open Infrastructure for Network Computing (BOINC) software platform and uses free software released under the GNU General Public License, version 2.  Einstein@Home is hosted by the University of Wisconsin–Milwaukee and the Max Planck Institute for Gravitational Physics (Albert Einstein Institute, Hannover, Germany).  The project is supported by the American Physical Society (APS), the US National Science Foundation (NSF), and the Max Planck Society (MPG).  The Einstein@Home project director is Bruce Allen. Alessandra Buonanno is a theoretical physicist working in gravitational-wave physics and cosmology.  She is a director at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute) in Potsdam, Germany, leading the "Astrophysical and Cosmological Relativity" division.  She holds a College Park professorship at the University of Maryland, College Park in College Park, Maryland, and is a meber of the LIGO Scientific Collaboration. Bernard F. Schutz (born August 11, 1946, in Paterson, New Jersey) is an American physicist.  His research is on Einstein's theory of general relativity, more concretely on the physics of gravitational waves.  He is one of the directors and head of the astrophysics group at the Max Planck Institute for Gravitational Physics in Potsdam, Germany.  He is principal investigator in charge of data analysis for the GEO600 collaboration (which, in turn, is part of the LIGO Scientific Collaboration, the largest concerted effort to directly detect gravitational waves).  Schutz is also a member of the science team coordinating the planning and development for the space-borne gravitational wave detector LISA (Laser Interferometer Space Antenna), and he was instrumental in the foundation of the electronic, open access review journal "Living Reviews in Relativity". The Max Planck Institute for Gravitational Physics (Albert Einstein Institute) is a Max Planck Institute whose research is aimed at investigating Einstein’s theory of relativity and beyond: Mathematics, quantum gravity, astrophysical relativity, and gravitational wave astronomy.  The Institute was founded in 1995 and is located in Golm, Potsdam (theoretical branch) and in Hannover (experimental branch). The Fermi Gamma-ray Space Telescope (FGST), formerly called the Gamma-ray Large Area Space Telescope (GLAST), is a space observatory being used to perform gamma-ray astronomy observations from low Earth orbit.  Its main instrument is the Large Area Telescope (LAT), with which astronomers mostly intend to perform an all-sky survey studying astrophysical and cosmological phenomena such as active galactic nuclei, pulsars, other high-energy sources and dark matter.  Another instrument aboard Fermi, the Gamma-ray Burst Monitor (GBM; formerly GLAST Burst Monitor), is being used to study gamma-ray bursts.
Answer: Bruce Allen