The contents of the syringe are not known but the air marshal was flown back to the US where he is now under observation.
Barak Barfi, a spokesperson for the slain journalist's family, also accused the U.S government of making a "number of inaccurate statements."
Some are frustrated by Obama's decision to delay executive action on immigration, but others say that was never a solution anyway.
President Obama is set to lay out his strategy for fighting ISIS in a speech Wednesday. Here's a list of what he might announce.
Russia has pledged to strike back, hinting at a ban of all EU flights over Russian territory.
The attacks reportedly targeted a major Sunni tribe called the Al-Jabour, which has sided with Iraqi forces against Islamic State.
US airstrikes are helping Iraqi ground troops regain territory lost to the Islamic State.
The Arab League endorsed a UNSC resolution calling on states to "act to suppress the flow of foreign fighters, financing and other support to Islamist extremist groups in Iraq and Syria".
ISIS is currently holding about 46 Turkish citizens hostage.
"In some ways, we are solving a non-existent problem because we can't solve the existing ones," a Western defense official, speaking on condition of anonymity, said as the 28-nation summit ended on Friday.
Obama told NBC's "Meet the Press" that the outbreak, which has killed 2,100 people in African five countries, was unlikely to spread to the United States in the short term.
On "Meet the Press," the president said there's overwhelming support for an offensive. His speech is planned for Wednesday.
The president had pledged action on immigration reform by the end of the summer. Republicans call the reversal "raw politics."
An ally in the U.S.-led NATO military alliance, Turkey is the only Muslim nation in a "core coalition" of 10 countries committed to battle IS militants in Iraq.
When he saw the monument, he reportedly said, “How cool is this?”
Many said Republicans were certain to take over, but recent polls suggest otherwise.
Hillary Clinton said while in Mexico Friday she has a "unique vantage point" on the presidency.
Obama also said in a speech in Wales on Friday that NATO would implement a readiness action plan to monitor the situation in Ukraine.
The public is invited to pay their respects to slain American journalist Steven Sotloff at a service in his Florida hometown Friday.
Though she didn't offer specifics, the prospective presidential candidate called on businesses and politicians to confront climate change.
U.S. Secretary of State John Kerry says a new Iraqi government will also help stop ISIS.
"Joan Rivers is an icon, a legend, and should be remembered as such," reads the Change.org petition.