News roundup: Google passes Exxon as world’s second most valuable firm … U.S. to get approximately $17.2 trillion debt limit today … La. rig count drops three on the week

The race is on: Google has raced ahead of ExxonMobil as the world's No. 2 most valuable company, and the advertising company is fast narrowing the gap on No. 1 Apple. USA Today reports the ability to …