Pentagon Press Secretary Geoff Morrell says the cancellation was not a snub, but was caused by the prime minister's obligation to parliament.

VOA: standard.2009.12.11

The president told the audience at the Naval Air Station in Jacksonville that the United States has an obligation to its latest war dead.

VOA: standard.2009.10.26

White House officials say the president has a clear obligation to assess the effectiveness of U.S.strategy before placing more American troops in harm's way.

VOA: standard.2009.10.25

He also noted that Islamic authorities say a face veil is not a religious obligation.

VOA: standard.2010.01.30

I say it is criminal and we each have an obligation to stop it."

VOA: standard.2010.03.08

"We are determined to ensure that our NATO allies have the protection they need, when they need it because that is our solemn obligation under Article 5.

VOA: standard.2009.10.23

"Israel has an obligation under the roadmap to stop settlement activities,"

VOA: standard.2009.08.21

President Obama and I consider this to be a solemn obligation."

VOA: standard.2009.10.21

"President Obama and I consider this to be a solemn obligation."

VOA: standard.2009.10.22

that is an Israeli obligation emanating from the roadmap,".

VOA: standard.2009.09.12

"The way I see it,having recovered with the help of the American government and the American taxpayer, our banks now have a greater obligation to the goal of a wider recovery,"

VOA: standard.2009.12.20