Allowing anonymous access to files on S3.

s3_anon.policy

{
  "Id": "Policy<ENTER_RANDOM_NUMBERS_HERE>",
  "Statement": [
    {
      "Sid": "Stmt<ENTER_RANDOM_NUMBERS_HERE>",
      "Action": [
        "s3:GetObject"
      ],
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::your.bucket.name/*",
      "Principal": {
        "AWS": [
          "*"
        ]
      }
    }
  ]
}