By means of Laila Kearney SAN FRANCISCO (Reuters) – Unions agreed late on Tuesday to place off a doubtlessly crippling San Francisco-house rail strike for a third day in a row, as talks with management wore on late into the evening with out an agreement. The biggest of two unions representing greater than 2,000 Bay House Speedy Transit (BART) drivers and body of workers stated there had been some development in opposition to a deal on pay and contracts and trains would run as commonplace on Wednesday. …