Dick Cheney, 71, was in a Virginia hospital following a heart transplant Saturday. Host Laura Sullivan talks with NPR's Rob Stein about the former vice president's health.

An attorney for the family of slain Florida teenager Trayvon Martin said that after meeting with federal authorities, he doubts the killing will be charged as a hate crime. But the lawyer said he's encouraged that the state's investigation of the shooting will lead to criminal charges filed against George Zimmerman.

The former vice president's office released a statement Saturday disclosing the surgery, and saying that Cheney, 71, has been on the transplant list for more than 20 months.

Every year, thousands of migrants cross the border from Mexico to Arizona, leaving behind artifacts from their journeys. Some of the items end up in trash bags, others in a museum. Still others end up in the morgue.

As the Supreme Court heard arguments this week on sentencing juveniles, more than a dozen families of teenagers sentenced to life without parole came to Washington to advocate hand-in-hand with the families of the people their children murdered.

The four things to watch for in Louisiana are Romney's share of the vote which must be 25 percent or more for him to gain any of the delegates who are in play Saturday. Also if he gets a large enough share of Catholic and evangelical votes, that could help him get to 25 percent as well.

Saturday is presidential primary day in Louisiana where 20 delegates are at stake. Mitt Romney, Rick Santorum, Newt Gingrich and Ron Paul all campaigned there Friday. Romney leads in national polling, but Santorum is ahead in Louisiana.