Multiple smaller missions as a direct pathway to Mars sample return

P.B. Niles1, P. Abell1, J. Andrews-Hanna3, P. D. Archer2, A.M. Baldridge4, J.F. Bell III5, J. Bishop6, J. E. Bleacher7, M.C. Bourke4, A.J. Brown6, V.F. Chevrier8, C.M. Corrigan9, D.A. Crown4, D.S. Draper1, B. L. Ehlmann10, C.A. Evans1, R.L. Fergason11, M. Fries4, E.K. Gibson1, T. Glotch12, T.G. Graff13, L. D. Graham1, J. Grotzinger10, J. Gruener1, E.M. Hausrath14, B.M. Hynek15, J.H. Jones1, E.S. Kite10, L.P. Knauth5, A.T. Knudson4, S.P. Kounaves16, S.M. Lederer1, M.T. Lemmon17, J. Michalski4, D. Ming1, S. Murchie18, H.E. Newsom19, E. Noe Dobrea4, D.Z. Oehler13, M.M. Osterloo20, A.D. Rogers12, C.H. Seaman1, M.L. Searls21, J.C. Stern7, R.A. Socki13, B. Sutter13, D. Vaniman4, C.M. Weitz4, R.M.E. Williams4, J.J. Wray22, S.P. Wright23, M. Zolotov5. 1NASA JSC,2Oak Ridge Associated Universities/JSC, 3Colorado School of Mines, 4Planetary Science Institute, 5Arizona State University, 6SETI Institute, 7NASA GSFC, 8University of Arkansas, 9Smithsonian Institution, 10California Institute of Technology, 11U.S. Geological Survey Astrogeology Science Center, 12Stony Brook University, 13Jacobs-ESCG, 14University of Nevada Las Vegas, 15University of Colorado, 16Tufts University, 17Texas A&M University, 18Applied Physics Laboratory, 19University of New Mexico, 20Laboratory for Atmospheric and Space Physics, 21University of Nebraska, 22Georgia Institute of Technology, 23Auburn University.