Outstanding Problems in Particle Astrophysics -- Constructing the Cosmos, from Sunboats to Superclusters -- Recent Results from the Spitzer Space Telescope: A New View of the Infrared Universe -- Beyond the Standard Model in Particle Physics and Cosmology: Convergence or Divergence? -- B-L Genesis: Generalities and Impact on Neutrino Physics -- Stellar Explosion: From Supernovae to Gamma-Ray Bu…