In the first tangible fallout from North Korea's announced plans for  a satellite launch next month, the Pentagon has suspended a program to look for  the remains of the  5,300  Americans classified as missing in North Korea during the Korean War.  Both the U.S. and North Korea had agreed in October to restart the program after a previous suspension that lasted seven years.

The State Department has been saying a launch would be a deal-breaker for the agreement reached with the U.S. just a few weeks ago and would, more importantly, put 240,000 tons of U.S. food aid at risk.   But suspending the search program sends a tangible message to North Korea that the U.S. is serious about its concerns.

Word of the suspension came at  today's Pentagon briefing by Pentagon press secretary George Little.   "We have suspended that effort because we believe that North Korea has not acted appropriately in recent days and weeks and that it's important for them to return to the standards of behavior that the international community has called for. We do hope at some point to be able to re-engage the effort."

The agreement reached in October to restart the program called for the first U.S. team to arrive in North Korea later this month. A Defense official says no U.S. personnel had arrived at the time the suspension took effect.  That official says that the U.S. informed North Korea of its decision to suspend the program last night and that it went into effect today.

The program involves the U.S. sending search teams to old Korean War battlefields to look for the remains of missing American service members.

When asked why the U.S. was linking the MIA search to North Korea's recent announcements, Little said, "When there are suggestions that they might launch ballistic missiles, when they make bellicose statements about South Korea and engage in actions that could be construed as provocative, we think that it's not the right time to undertake this effort. "

DOD spokesperson Tara Rigler said North Korea had linked the search remains to other policy issues.  She noted recent negative comments from North Korea about long-planned military exercises between the  U.S. and South Korea.  "Citing these exercises, the DPRK refused to take steps agreed to, in the current arrangement, to resume remains recovery operations, including permitting an advance team into North Korea to make necessary preparations for operations."

She adds, "These actions, and now North Korea's recently announced missile launch, call into question the credibility of all of North Korea's commitments, including the remains recovery operations. As a result, we are suspending the current arrangement to resume remains recovery operations with the DPRK until their actions indicate a willingness to move forward in good faith on its commitments."

There are actually 7,965 Americans still categorized as missing from the Korean War, but 5,300 of them are believed to be on North Korean territory.

A Defense official says that the U.S. had planned to send a small advance team in mid-March to be followed by four search operations in April, one of them to two areas near the Chosin Reservoir.  The Chosin Reservoir was the scene of one of the bloodiest battles of the Korean War, and it is believed that 2,000 American soldiers and Marines went missing at that location.