Officials are looking for signs of "unlawful coordination" on flight prices.
The measure comes as lawmakers face a Sept. 30 deadline for the expiration of the FAA's funding.
"I want to see if we can get bipartisan work done with Congress," he said.
The company said U.S. airlines arguments about "patently false."
Drivers in Idaho, Maryland, Rhode Island, Nebraska and Vermont will be charged more at the pump.
The prediction is a 0.7 increase over 2014 travel for the July 4 holiday.
Sen. Bob Casey is pushing airlines to allow parents to choose seats near their children for free.
Lawmakers are facing a July 31 deadline for the expiration of federal road funding.
Seven other lawmakers also flew with Obama to the funeral of Rev. Clementa Pinckney.
For now, a human test driver will remain in all the vehicles.
Gov. Larry Hogan (R) decided instead to build a line in the Washington, D.C., suburbs.
The measure would require greater tracking of ports.
The agency posted a picture of a bag containing $75,000 on Twitter.
The FAA said the Washington, D.C. metro area is a "No Drone Zone."
The FAA is reminding airline passengers that fireworks are prohibited on flights.
They say 5.7 billion trips have been taken on toll roads this year.
Police are investigating alleged violations of a law aimed at Uber's low-end service in the country.
The company has agreed to add track crossings to its GPS maps.
Polish airline LOT recently had to ground planes after hackers took out its computer system.
Sen. Bob Casey criticized House Republicans for cutting Amtrak's funding by about $270 million.
The proposal would have increased gas taxes in Oregon by 4 cents per gallon.
Anthony Foxx is the former mayor of Charlotte, N.C.
The senator poked fun at a New York Times story about his "financial struggles."
The measure calls for spending approximately $1.65 billion annually on Amtrak.