Washington Mayor Muriel Bowser listens at left as Police Chief Cathy Lanier speaks during a news conference in Washington, Thursday, May 21, 2015, to discuss the investigation into the mysterious slayings of a wealthy Washington family and their housekeeper. Lanier said investigators believe a suspect in the slayings is in the Brooklyn area of New York City.  (AP Photo/Cliff Owen)

Your daily look at late-breaking news, upcoming events and the stories that will be talked about Friday:

In this image released by CBS, David Letterman appears during a taping of his final "Late Show with David Letterman," Wednesday, May 20, 2015 at the Ed Sullivan Theater in New York. After 33 years in late night television, 6,028 broadcasts, nearly 20,000 total guest appearances, 16 Emmy Awards and more than 4,600 career Top Ten Lists, David Letterman is retiring. (Jeffrey R. Staab/CBS via AP)

Your daily look at late-breaking news, upcoming events and the stories that will be talked about today: 1. HOW VAST EXTREMIST RECRUITING NETWORK NETS LEGIONNAIRES As many as 17,000 people from more than 90 countries have streamed to Syria and Iraq to wage holy war for the Islamic State group. 2. ANCIENT CITY FALLS TO […]

In this undated photo made available in May 2015 by the Mission Prehistorique au Kenya - West Turkana Archaeological Project, Sonia Harmand and Jason Lewis hold stone tools found in the West Turkana area of Kenya. The artifacts, dated at 3.3 million years old, are much older than the earliest known trace of our own branch of the evolutionary family tree. So it’s a new challenge to the traditional idea that only members of our branch made stone tools. The discovery was reported in the journal Nature on Wednesday, May 20, 2015. (MPK-WTAP via AP)

“It really absolutely moves the beginnings of human technology back into a much more distant past, and a much different kind of ancestor than we’ve been thinking of,” said anthropology professor Alison Brooks of George Washington University, who has examined some of the tools.

This photo provided by courtesy of HBO shows, Sophie Turner, left, as Sansa Stark, and Iwan Rheon, as Ramsay Bolton, in a scene from season 5 of "Game of Thrones."  The show airs Sundays at 9 p.m. EDT. (Helen Sloan/HBO via AP)

Your daily look at late-breaking news, upcoming events and the stories that will be talked about Wednesday:

FILE - In this March 20, 2014 file photo, Al-Qaida fighters wave al-Qaida flags as they patrol in a commandeered Iraqi military vehicle in Fallujah, Iraq. Is there a plan B for Iraq? The fall of Ramadi shows the Iraqi army is still weak, Sunni-Shiite reconciliation is slow and U.S. bombing is not decisively helping. (AP Photo, File)

“The president’s plan isn’t working. It’s time for him to come up with overarching strategy to defeat the ongoing terrorist threat,” House Speaker John Boehner said.

FILE - In this Nov. 8, 2005 file photo, firefighters work to extinguish burning cars set on fire by rioters in Gentilly, south of Paris, France. Two young boys were electrocuted in a power substation in Clichy-sous-Bois, while hiding from police on Oct. 27, 2005. A court in western France rules on whether two police officers contributed to the deaths of two teens in 2005, in an accident that sparked three weeks of national riots by largely minority youth angry at bleak job prospects and entrenched discrimination. Tensions between housing project youths and France’s largely white police force haven’t abated 10 years later. The boys’ families and neighbors want the police held unaccountable, but even prosecutors say they don’t have enough evidence and requested acquittal. (AP Photo/Michel Spingler, File)

“You are responsible!” shouted Zyed’s brother Adel at the two police officers, just a few meters (yards) away. Bouna’s brother Gaye told The Associated Press, “I have a sense of impunity, of injustice, and disgust.”

FILE - In this April 11, 2015 file photo, Afghan farmers harvest raw opium at a poppy field in Kandahar’s Zhari district, Afghanistan. A team led by researchers at the University of California, Berkeley has identified the steps to make morphine and other painkillers in the laboratory without needing to grow opium poppies. While homemade morphine is not yet a reality, researchers are calling for regulations. (AP Photo/Allauddin Khan,File)

LOS ANGELES | Scientists have figured out all the steps to make morphine and similar painkillers without using opium poppies, opening the door for home-brewed drugs and even wider abuse. While no one has yet reported making morphine in the laboratory from scratch, some experts are calling for regulations to prevent garage tinkerers from making do-it-yourself […]