As President and Commander-in-Chief, my most solemn obligation is the security of the American people.

WHITEHOUSE: The White House

The purpose -- the focus that he has is on our obligation to the security of American citizens and also getting the policy right.

WHITEHOUSE: Press Briefing

There is no Security Council resolution which imposes an arms embargo in Lebanon and such force would have as its obligation to report any violation of this particular Security Council resolution.

NPR: Talks Continue on Lebanon Truce, Troops

The main obligation of pension trustees is to ensure the retirement security for their members.

WSJ: Review & Outlook: Randi Weingarten's Pension Veto

Mr Obama, meanwhile, said America's commitment to the security of Israel was "a solemn obligation".

BBC: US and Israel talk tough on Iran during Obama visit

"CDO" is a common term for collateralized debt obligation, an investment-grade security backed by a pool of bonds, loans and other assets.

FORBES: Magazine Article

As CIOs will remain accountable for quality of service, financial performance, compliancy and security, it is a corporate obligation to get shadow IT under control.

FORBES: Why The CIO Must Be The Chief Innovation Officer

And of course, the principle at stake at the U.N. was really important, and that is the safety and security of diplomats around the world, and countries meeting what is an absolutely fundamental diplomatic obligation -- and that is to respect the privileges and immunities and safety of the diplomats around the world from civilized countries.

WHITEHOUSE: Press Briefing