By the end of the year, General Dynamics' advanced information systems and C4 systems units will be merged into a new business unit that its chief says will be better positioned for a changing market. The two units are part of General Dynamics' information systems and technology business, the unit most vulnerable so far to government spending cuts. In early 2013, General Dynamics devalued the business by $2 billion because of reduced government demand. General Dynamics announced the merger in...