Three things you need to know today.
Georgia execution: Supporters of death-row inmate Troy Davis have vowed to continue fighting to stave off Wednesday's scheduled execution, despite a decision by the Georgia Board of Pardons and Paroles to deny clemency.
"We're calling on anyone who has any power to stop this grave injustice from occurring." Laura Moye, campaign director for Amnesty International USA, said at a news conference.
Davis is scheduled to die by lethal injection at 7 p.m. Wednesday in Jackson, Georgia, for the 1989 shooting death of off-duty police officer Mark MacPhail.
The parole board declined to grant Davis clemency Tuesday following a hearing Monday in which it heard testimony calling into question physical evidence and witness statements that a Chatham County jury relied on in convicting Davis in 1991. In Georgia, only the board - not the governor - has the right to grant clemency.
Since Davis' conviction, seven of the nine witnesses against him have recanted or contradicted their testimony. Davis' supporters say the original witnesses were fearful of police and spoke under duress.
One of three men convicted for his involvement in the infamous dragging death of a black man 13 years ago is scheduled to be executed Wednesday.
Texas execution: Lawrence Russell Brewer, 44, is scheduled to die by lethal injection in the killing of James Byrd.
Brewer and two other white men chained the 49-year-old black man to the back of a pickup truck and dragged him to death on a country road near Jasper, Texas.
Accomplice John William King also was sentenced to death and is awaiting an appeal. A third man, Shawn Berry, received life in prison.
Obama at U.N.: President Barack Obama will lay out the U.S. view of the "seismic change" seen around the world in the past year, particularly in the Arab world, when he speaks to the United Nations on Wednesday, aides said.
National Security Council¬†strategic communications director Ben Rhodes said the sweeping changes across the region will take up much of Obama's address to the General Assembly on Wednesday morning and "speak to the momentum of democratic change in the world."
"There's been a seismic change in the past year, and I think the discussions today underscore that," he said.