allentown explosion

.The U.S. is crisscrossed with more than 2.5 million miles of fuel pipelines, or enough to circle the earth about 100 times….Much of the underground infrastructure in the U.S., which also includes water and sewer pipes, has been in use for more than 50 years and needs to be evaluated and, where needed, replaced, said Blaine Leonard, president of the American Society of Civil Engineers.US NEWS PAPER

allentown explosion