On June 24 , 2009 , Margaret Brennan left CNBC to join Bloomberg Television : At Bloomberg , she anchored '' InBusiness with Margaret Brennan '' , a weekday program broadcast live from the New York Stock Exchange that covered the top political , economic and global financial news impacting the marketplace . During her tenure she broadcast live from Riyadh , Dubai , Cairo , London , Dublin , Abu Dhabi and Davos . Brennan covered top breaking news stories involving the European debt crisis , the largest insider trading case in U.S. history and the BP oil spill . She anchored live from Tahrir Square as Hosni Mubarak stepped down after 30 years in power
BP oil spill
Deepwater Horizon oil spill
Margaret Brennan