Age-discrimination claims have hit an all-time high, up more than 49 percent, from 16,550 claims filed in 2006 to 24,600 in 2008, according to the Equal Employment Opportunity Commission (EEOC). And that's before the worst of the recession even began. Why the upsurge? What can employers do to protect themselves? To find out, DiversityInc asked discrimination-law attorney Weldon Latham..