The officer did not say how the Air Force would mitigate the difficulty.
Airstrikes also hit a separate terror group, Khorasan.
“We should take nothing off the table," said the former Homeland Security chairman said.
“That’s not going to solve the problem," the Democrat said.
Even action taken under the auspices of humanitarian support would be viewed as a violation.
Russia announced new exercises along Ukraine's border on Thursday.
Forty veterans reportedly died while waiting for appointments in Phoenix.
The NSA leaker regrets softballing the Russian president associates say.
Ruth Bader Ginsberg and Antonin Scalia both think the programs will reach the high court.
The Senate Intelligence Committee has already voted to release the report.
The attorney general pledged to bring additional proposals to Congress.
Two F-16s were scrambled after the aircraft strayed into restricted airspace.
Officials said "initial indications" are "the strikes were successful."
Democrats, meanwhile, warn the president against escalation.
“Escalating it is not in the cards,” the Illinois Democrat said.
The South Carolina Republican accused the president of ignoring his national security team.
“America is proud to act alongside our closest friends and allies,” President Obama said.
Reports say as many as 40 veterans died while waiting for appointments.
Anwar al-Awlaki, a U.S. citizen who joined al Qaeda, was killed in a drone strike in 2011.
The strikes come days after a video of a large al Qaeda gathering surfaced.
The Washington Post and The Guardian won Pulitzers for NSA stories.
In previous interviews, Clinton has refrained from criticizing Snowden.
Liz Cheney defends her father from Pelosi's criticism.
The lawsuit concerned drone strikes that killed three U.S. citizens in Yemen.