President Obama is expected to make a statement from the White House about the situation in Ukraine.

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Russian columns enter Ukraine, Obama lays blame

Ukrainian officials said Thursday that two columns of Russian tanks entered the country after firing missiles at a border post. President Obama blames Russia for the escalation of violence in the region.

Obama: Islamic State is an 'immediate' threat in Iraq

President Obama said Thursday that the U.S. is prepared to provide support in the forms of training and equipment to Iraq forces as they fight to prevent further advancement of the Islamic State in the region.

Obama: 'Russia is responsible for violence in Ukraine'

President Obama said Thursday that Russia is more isolated now than any time since the Cold War, siting Russian President Vladimir Putin's inability to solve the conflict in Ukraine diplomatically. This comes after Ukrainian Prime Minister Arseniy Yatensyuk said Russian troops have entered Ukraine and are working with separatists east of Donetsk.

Ebola cases could eventually reach 20,000

The Ebola outbreak in West Africa eventually could exceed 20,000 cases, more than six times as many as are known now, according to the World Health Organization.

Shooting by 9-year-old girl stirs up gun debate

After a 9-year-old accidentally killed an Arizona shooting instructor as he was showing her how to use an automatic Uzi, some question whether she should have been allowed to operate the weapon.

Defense rests in McDonnell trial

Defense lawyers have finished presenting their case in the corruption trial of former Virginia governor Bob McDonnell and his wife, Maureen, who are accused of accepting $165,000 in gifts and loans.

Police bullet killed ‘Cops’ film crew member

A grand jury is expected to investigate the shooting death of “Cops” sound superviser Bryce Dion. Omaha's police chief says an officer-fired bullet killed Dion Tuesday as he was recording officers responding to a robbery.

Netanyahu claims victory in Gaza

Israeli Prime Minister Benjamin Netanyahu has declared victory in the Gaza war against Hamas, saying a cease-fire deal was reached without giving anything to the Islamist militant group.

Pa. man kidnapped and dumped in river survives, 2 dead

Authorities are searching for suspects after the bodies of two men who had been bound with duct tape, stabbed and weighed down with makeshift anchors were pulled from a river in Philadelphia on Wednesday. A third man, who was also bound and stabbed, escaped and is in critical condition.

‘Cops’ crew member killed by officer while filming robbery

Omaha police say officers who opened fire while disrupting a robbery killed a crew member with the "Cops" television show and the suspect.

Military searching for pilot after jet crashes

Military officials say the jet that crashed in western Virginia was an Air Force F-15C based in Massachusetts and the pilot's status is unknown.

Speaker Boehner's 'monkey in the room'

House Speaker John Boehner (R-Ohio) posted this video with a toy his staff bought him as a joke that has become a fixture in his office. "Every 15, 30 minutes, [the staff] come in and wind me up, and I do my thing," Boehner says.

Mother of U.S. journalist in Islamic State capitivity pleads for son's release

Shirley Sotloff, the mother of American journalist Steven J. Sotloff, pleads for her son's release from Islamic State captors and speaks directly to the group's leader, Abu Bakr al-Baghdadi, in video obtained by The Post. Islamic State militants referenced Sotloff in the video showing the execution of James Foley.

Charlie Crist wins Florida Democratic primary

Former Florida governor Charlie Crist won the Democratic gubernatorial primary on Tuesday, setting him up for a November run against incumbent Republican Gov. Rick Scott.

U.S. 'strongly supports' Gaza cease-fire

State Department spokeswoman Jen Psaki said the U.S. "strongly supported" the cease-fire agreement between Israel and Hamas and asked all sides to comply with its terms.

Latest from Post video journalists

Behind the circumcision ritual

Behind the circumcision ritual

Adults attending conversion classes at Sixth and I synagogue learn about the traditions behind the ancient Jewish practice of circumcision.

Google Chromecast at The Washington Post: How you can watch

Google Chromecast at The Washington Post: How you can watch

PostTV has incorporated technology that allows you to play any of our videos on your TV set through the popular Chromecast device. That means you can watch videos and news shows from The Washington Post and control the playback right from your computer, tablet or smartphone.

Property rights and the pipeline

South Dakota rancher John Harter tried to stop TransCanada from securing the right of eminent domain over his land where they want to put part of the proposed Keystone XL pipeline, but Harter recently lost his battle in court.

Brazil swept up by new energy source

Brazil swept up by new energy source

In Northeastern Brazil, energy companies are erecting wind farms to capitalize on the constant winds that have challenged farming families for generations.

Making the most out of your museum visit

Making the most out of your museum visit

The Post's Anne Midgette shares five tips for how to get the most out of your visit to a museum.

Obama slams GOP: 'Do your job'

Obama slams GOP: 'Do your job'

A mashup of highlights from the president's speech on the government shutdown at M. Luis Construction company in Rockville, Md. Thursday.