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First , no consensus exists over the U.S. role in the world , on the scope of U.S. vital national interests , or indeed on what a security " interest " is in the first place ; as such it is difficult to define threats to those interests . The laptop will probably last through this decade , but we are exploring different alternatives and as such it is likely that conclusions on this subject will be different in 2011 . This galaxy may represent a local template for the young galaxies that will be observed with NGST at high redshift , and as such it is essential that we understand its evolutionary status . As such it is accountable only to its shareholders for its actions . As such it is unlikely that individuals or households can reduce their poverty , and certainly not without this being at the expense of others .