Fishermen in Louisiana are concerned that liquified natural gas is affecting the shrimp and oysters they rely on for their livelihood. Venture Global, which owns several liquified natural gas facilities, says its projects don’t affect fishing or shrimping in the area. Ben Tracy has more.

Here’s a look at the top stories making headlines on the “CBS Evening News” with Major Garrett.

The FDA on Tuesday approved a new medication for people in the early stages of Alzheimer’s disease. Dr. Jon LaPook explains what the drug is meant to do and explores its limitations.