CHICAGO (CBS) — The head of the Transportation Security Administration will face some tough questions Friday from Mayor Rahm Emanuel, U.S. Sen. Dick Durbin, members of Congress, and others, as the agency seeks to reduce excruciatingly long wait times at airport security checkpoints.

The meeting with TSA Administrator Peter Neffenger comes after the agency announced efforts to boost security staffing at both Chicago airports, which have seen lines as long as three hours in recent days.

While O’Hare International Airport was packed early Friday, lines were not nearly as long as they were Sunday, when about 450 American Airlines passengers alone missed flights due to extremely long security lines.