The United Nations begins negotiations Monday on a legally binding treaty to prohibit nuclear weapons.
This comes as the United States commences a review of what role its nuclear weapons should now play.
"Shortly after taking office, the president directed a new Nuclear Posture Review to ensure that the United States nuclear deterrent is modern, robust, flexible, resilient, ready, and appropriately tailored to deter 21st century threats and reassure our allies," White House senior assistant press secretary Michael Short said Friday.
Gunman Surrenders After Fatal Shooting on Las Vegas StripThe gunman in a fatal shooting on the Las Vegas Strip who barricaded himself inside a public bus has surrendered peacefully after shutting down the busy tourism corridor for hours, police said.
The standoff began about 11 a.m. local time Saturday with a shooting that killed one person and injured another. It happened on a double-decker bus stopped on Las Vegas Boulevard near the Cosmopolitan hotel-casino.
Two people were taken to the hospital after the shooting, University Medical Center spokeswoman Danita Cohen said.
Fans Gather at Public Memorial, Celebrate Carrie Fisher, Debbie Reynolds
Hundreds of fans and friends of Debbie Reynolds and Carrie Fisher gathered for a public memorial honoring the celebrated mother and daughter.
The two-hour ceremony Saturday was a mix of music and dance spliced with some never-before-seen footage of the mother-daughter duo reflecting on their lives. The poignant event was a laughter-filled memorial for the late actresses.
The ceremony was led by Todd Fisher, who lost his mother and sister one day apart in late December.
Trump Supporters, Critics Clash on California BeachA scuffle broke out on a Southern California beach where supporters of President Donald Trump were marching when counter-protesters doused organizers with pepper spray, authorities said Saturday.
The violence erupted when the march of about 2,000 people at Bolsa Chica State Beach reached a group of about 30 counter-protesters, some of whom began spraying the irritant, said Capt. Kevin Pearsall of the California State Parks Police. Three people were arrested on suspicion of illegal use of pepper spray and a fourth person was arrested on suspicion of assault and battery, he said.
Trump's Own Party Hands Him Health Care DefeatOne extra day could not buy President Donald Trump and his Republican Congress the first major legislative victory they needed to set the tone for the new administration.
Republicans canceled a crucial health care bill vote at the last minute Friday rather than lose a battle of numbers on the floor of the U.S. House of Representatives.
President Trump's Own Party Hands Him Stunning Defeat
The cancellation followed a chaotic Thursday when the leadership postponed a vote in the hope that 24 more hours could win a long-promised repeal and replacement of President Barack Obama's Affordable Care Act.
California Seeks to Free Thousands of Inmates Over Four Years
California's Department of Corrections has announced new rules to parole inmates more quickly, in the hope of reducing the state's prison population.
The proposed regulations still must be approved by state regulators. They would reduce the remaining time in prison for inmates who get a college degree or take self-help classes. One month of a sentence would be waived each year for prisoners who join and complete programs such as alcohol and substance counseling, anger management or life-skills lessons.
Violent Portrait Emerges of London Attacker
So much is known now about the 52-year-old man who killed four people Wednesday and injured dozens of others on Westminster Bridge and in London's Parliament Square.
So much, but so little.
His last dinner before the rampage was a kebab, eaten at a cheap hotel in the southern coastal town of Brighton, 87 kilometers from London. The hotel staff said there was nothing to suggest he was on the eve of adding his name to the roster of jihadists who have died while carrying out recent atrocities in Europe.