TALLINN, Estonia --President Barack Obama says Americans will not be intimidated by the "horrific" violence of Islamic State militants after the beheading of a second U.S. journalist.
The president is vowing that "justice will be served" after the U.S. verified the authenticity of a video of 31-year-old freelance reporter Steven Sotloff's killing.
In the Sotloff video, a masked militant warns Obama that continuing airstrikes against the group in Iraq will be met with the killing of more Western captives. The terror group is believed to be currently holding at least one British journalist and two American aid workers.
The video, released Tuesday, comes just two weeks after another video was released showing the beheading of U.S. reporter, James Foley.
Obama said at a news conference while traveling Wednesday in Estonia that their deaths only unite Americans. He says ISIS will achieve nothing with their barbaric murders.
"Those who make the mistake of harming Americans will learn that we will not forget and that our reach is long and that justice will be served," Obama said.
Here in the U.S., critics say the blame for the rise of ISIS falls squarely on the shoulders of the president and his administration's weak foreign policy.
Meanwhile, the family of Sotloff issued a statement on Wednesday saying Sotloff dedicated his life to portraying the suffering of people in war zones, but was "no hero." Family spokesman Barak Barfi told reporters gathered outside the family's suburban Miami home that Sotloff "tried to find good concealed in a world of darkness," and to give voice to the weak and suffering in the Arab world.
In addition, an Israeli official has confirmed that Sotloff was also an Israeli citizen.