Why Are USPS Mail Trucks Bursting Into Flames Spontaneously?

In the last six years, more than 400 United States Postal Service mail trucks have reportedly burst into flames, sometimes right in the middle of the neighborhoods that they are delivering mail to. Right now, there are more than 140,000 of these trucks still on the road. Inside Edition’s Investigative Unit spoke with Sean Kane, a leading expert in automotive safety, to find out the reasoning behind the explosions. Kane points to the age of the mail trucks, many of which are over 30 years old.