The Pentagon's decision to cancel the Multiple Kill Vehicle program from Lockheed Martin Corp. has contributed to a big jump in the cost of a sea-based missile shield being developed in cooperation with Japan, the Pentagon reports. Raytheon Co.'s SM-3 IIA interceptor system is now expected to cost $3.1 billion by the time it is deployed in 2014, an increase of $700 million over earlier estimates. The Pentagon says other nations have expressed strong interest in similar systems.