“We told the Americans at the beginning of the war, it’s not a picnic,” said Sohail Shaheen, a senior Taliban spokesman.
With extreme temperatures stifling much of the nation, utility companies prepare for power grids to be stressed.
A 1995 heat wave in Chicago killed 739 people. Now cities prepare for heat waves, but the root problems that caused the deaths still remain.
The three men, who previously pleaded guilty, were "motivated by hateful ideology," U.S. Attorney Thomas T. Cullen said in a statement.