The Supreme Court agreed…to hear Sprint Nextel Corp.'s appeal of an employment case that could make it harder for workers to prove discrimination allegations. The case centers on whether allegations by workers who are not part of an original lawsuit and who were supervised by other managers than those cited in the original filing can be considered at trial…. If the ruling by the...10th U.S. Circuit Court of Appeals stands, it expands employer liability for discrimination to include individuals who are not specifically cited in cases when filed, the companies say... [also refers to AT&T, Honeywell International, Lockheed Martin]