WATCH: Obama v angry heckler
President Barack Obama was interrupted three times by a woman who shouted about drones and detainees in Cuba as he delivered a speech on national security.
The woman was identified as Medea Benjamin from the anti-war group Code Pink. Ms Benjamin yelled from behind a bank of cameras before security removed her from the hall at National Defense University in Washington.
Scroll down to see the video
Mr Obama said at one point he was willing to "cut the young lady some slack" because the issues he was addressing are worth being passionate about.
"The voice of that woman is worth paying attention to," he said.
Ms Benjamin shouted: "86 were cleared already. Release them today!"
That appears to be a reference to detainees who remain in Cuba despite being cleared for transfer from the facility.
However, despite Mr Obama's acknowledgement of her point of view, Ms Benjamin was still removed from the event.
The Huffington Post's reporter Ryan J. Reilly tweeted a pic of security escorting her out.
He also questioned how she got into the event in the first place.
That was Code Pink's Medea Benjamin, saw her in line on way in. Don't get how they miss her.— Ryan J. Reilly (@ryanjreilly) May 23, 2013
In the speech, Mr Obama said he would give the US military the lead authority for using drone strikes to kill terrorists and lift a moratorium on transferring prisoners at Guantanamo Bay, Cuba, to other countries as part of a larger package of adjustments to his counterterrorism policies.