Associated Press: Exelon Corp. said Thursday its second-quarter net income dropped 32 percent as fuel costs for its fleet of nuclear power plants increased and its utilities spent more on battling storms. The Chicago utility, which powers customers in northern Illinois and southern Pennsylvania, said earnings fell to $445 million, or 67 cents per share, for the three months ended June 30 from $657 million, or 99 cents per share, a year ago. Revenue rose to $4.4 billion from $4.14 …