Obama nominates MIT scientist to head Energy Department

Calling sexual assault in the military a "scourge" and a "profound betrayal of sacred oaths and sacred trusts," Defense Secretary Chuck Hagel told the graduating cadets at West Point on Saturday, "You must be the generation of leaders that stop it."

President Obama praised "all the men and women who have given their lives in service to this country we love" in his weekly address on Saturday, saying, "We are who we are today - a free and prosperous nation, the greatest in the world," because of their sacrifice.

Mourning the devastation wrought by this week's tornado in Oklahoma, Sen. Jim Inhofe, R-Okla., delivered the weekly Republican address on Saturday, declaring, "Oklahoma has been hit hard, but we're not knocked out."

President Obama signed a bill conferring the Congressional Gold Medal on four young black girls killed during a 1963 church bombing in Birmingham, Alabama, saying that the tragedy and heartbreak of the bombing forced America to reexamine race relations and eventually helped bring about a "more just and equal and fair America."

First lady Michelle Obama stopped by Savoy Elementary School in Washington, D.C. on Friday to share in some dancing fun with the kids and reinforce the importance of the arts and a good education. After visiting several classrooms, the first lady told an audience at the school that hard work is the key to success, reminding them, "No one is born smart."

Flash Points: President Obama declared that the war on terror, "like all wars, must end," during a speech on Thursday, and CBS News Senior National Security Analyst Juan Zarate talks with CBS News National Security Correspondent Bob Orr about what the president meant when he said that and why any adjustments in counterterrorism policy must reflect a changing - but still perilous - threat environment.