NEW ORLEANS – The Coast Guard and local agencies are responding to an oil discharge at mile marker 57 on the Lower Mississippi River near Belle Chasse, Louisiana, Monday. Coast Guard Sector New Orleans received a report at 7:30 a.m. of a discharge of approximately 20 gallons of oil when the tug boat HALEY BROOKE began taking on water. The HALEY BROOKE has approximately 6,000 gallons of diesel onboard. Sector...