Firefighters remain at the scene of a smoldering blaze at a 440,000-square-foot recycling warehouse in Indianapolis, two days after the fire created huge plumes of black smoke that could be seen for miles. The fire broke out at 1 p.m. Saturday on Belmont Avenue and Oliver Street. Tires, wood pallets and shingles burned, and at least 30 propane tanks exploded. Firefighters are trying to determine a cause. Damages could be in the millions of dollars.