"I think the common ground clearly exists from a policy standpoint when talking about background checks, " said Dan Gross, president of the Brady Campaign to End Gun Violence.

CNN: Gun debate: Where is the middle ground?

"Sunflowers" (1888 or 1889), from Philadelphia's own collection, is a virtuoso performance in color harmony, showing a ceramic vase of perky yellow blossoms against a swirling cerulean background, but it is entirely orthodox from a compositional standpoint, as the vase sits squarely in the middle distance at eye level.

WSJ: Vincent Van Gogh Up Close | Philadelphia Museum of Art | A Matter of Perspective | By Jonathan Lopez