Barack Obama warned Russia that the West will be forced to apply a cost to Moscow if it fails to change course in its dispute with Ukraine.
The Cold War has returned with a vengeance, judging by the mood in Washington with talk of extensive sanctions against Russia.
President Barack Obama expressed concern about reported Russian military movement inside crisis-torn Ukraine and warned of consequences.
President Obama's national security team has met for an update on the situation in Ukraine and to discuss policy options, a senior US official has told Reuters.
The Dalai Lama has met President Obama in the Map Room of the White House.
US President Barack Obama will meet exiled Tibetan spiritual leader the Dalai Lama at the White House today, as the US raises concerns about tensions and human rights in Tibetan areas of China.
"We are concerned about continuing tensions and the deteriorating human rights situation in Tibetan areas of China," Caitlin Hayden, a spokeswoman for the White House National Security Council said.
"We will continue to urge the Chinese government to resume dialogue with the Dalai Lama or his representatives, without preconditions, as a means to reduce tensions," Hayden said in a statement announcing the 10am (1500 GMT) meeting.
Barack Obama is reportedly the face of fake Viagra in the northern Pakistani city of Peshawar, according to the AFP news agency.
The American President features on the packets as a "symbol of power and virility."
AFP reports that the banned Viagra packages are being smuggled in from Afghanistan and some versions are being sold for around 60p for four tablets.
President Obama has condemned the violence in Ukraine and said he holds the Ukrainian government responsible for making sure protesters are dealt with appropriately.
He said: "The United States condemns in the strongest terms the violence that's taking place. And we have been deeply engaged with our European partners as well as the Ukrainian government and the opposition to try to ensure that that violence ends.
"But we hold the Ukrainian government primarily responsible for making sure that it is dealing with peaceful protesters in an appropriate way, that the Ukrainian people are able to assemble and speak freely about their interests without fear of repression.
"And I want to be very clear as we work through these next several days in Ukraine that we're going to be watching closely and we expect the Ukrainian government to show restraint, to not resort to violence in dealing with peaceful protesters."
French journalists have indulged in a few "selfies" in the Oval office while accompanying their president, Francois Hollande, on his trip to the United States.
A reporter for Le Monde took this self portrait, with Mr Hollande and Barack Obama clearly visible in the background.
President Obama is no stranger to selfies, having controversially taken a picture of himself with David Cameron and Danish Prime Minister Helle Thorning-Schmidt during Nelson Mandela's memorial service.
Former Russian figure skater Irina Rodnina has apologised for tweeting a racist photograph of President Obama and First Lady Michelle - blaming hackers.
Attention was drawn to the image due to Rodnina's high profile role at the Winter Olympics opening ceremony, in which she lit the Olympic cauldron.
Today Rodnina, who is now a Russian politician, tweeted that she respected the Obama family and did not support racism, adding that her account had been hacked:
I respect the Obama family and apologize for not clearly stating earlier that I don't support the tweeted photo or racism in any form. (1/2)
My account was hacked and I should have shown better judgement in my initial response and handling of the event. (2/2)