Retail workers union says Wal-Mart showed `` blatant irresponsibility '' Discount chain said it made many preparations for Black Friday . Score: 6
Retail workers union says Wal-Mart showed `` blatant irresponsibility '' Discount chain said it made many preparations for Black Friday . Temporary worker was trampled as he unlocked doors at 5 a.m. Union has been one of Wal-Mart 's harshest critics .