WorldCom 's problems came to light last year , and the company filed for the largest bankruptcy in US history in July 2002 , citing massive accounting irregularities .
WorldCom 's problems came to light last year , and the company filed for the largest bankruptcy in US history in July 2002 , citing massive accounting irregularities .
WorldCom 's financial troubles came to light last year and the company subsequently filed for bankruptcy in July , 2002 .