The U.S. Supreme Court on Monday asked the Obama administration's solicitor general to weigh in on Pfizer Inc.'s (PFE) challenge to a pair of lawsuits alleging the drug maker illegally tested an antibiotic drug on children in Nigeria in 1996. Two groups of Nigerian families alleged that Pfizer violated international law when it tested the experimental drug Trovan on 200 Nigerian children during an outbreak of bacterial meningitis... Pfizer said the study, conducted in the Nigerian state of Kano, took place with the approval of the Nigerian government and the consent of the children's parents.