Pentagon leaders are expected to nail down the size of the Mine Resistant Ambush Protected vehicle program this week by validating an Army requirement for thousands of additional blast-proof vehicles, a move expected to generate a request to Congress for billions of additional dollars in the fiscal year 2008 supplemental request. Adm. Edmund Giambastiani, vice chairman of the Joint Chiefs of Staff and the Pentagon's top requirements officer, is convening the service vice chiefs this Thursday to consider -- and...