A confident Mitt Romney is shifting toward the general election as his grasp on the Republican presidential nomination tightens with a win in Illinois, saying Tuesday that he would work with Democrats to solve the nation’s problems — or “die trying.”

The International Space Station may provide the setting for a 500-day pretend trip to Mars in another few years.

“Big Easy Express,” documentary director Emmett Malloy’s rail-riding music documentary, made its first stop in Austin on the final day of SXSW.

The Justice Department is committed to combating bullying and harassment based on sexual orientation and has already made strides in bringing more prosecutions in that area, Attorney General Eric Holder said Tuesday.