Nasdaq chief embarrassed by Facebook glitch

The chief executive of Nasdaq said the stock exchange is ?humbly embarrassed? by its bungling of Facebook's hugely anticipated debut as a public company on Friday.Related StoriesBlair heckled by protesters at a US collegeDon?t Occupy my wedding: Bride?s big day ruined as anti-Nato protesters descend on ChicagoDon't Occupy my wedding: Bride?s big day ruined as anti-Nato protesters descend on ChicagoChicago braces for final day of Nato protestsBarack Obama: Confident Afghans can take security lead