Long TSA lines: How long will this go on?

(CNN)Zachary Annen and his husband arrived at Chicago O'Hare International Airport Sunday night three hours ahead of their flight.

The pair waited more than 2 1/2 hours in the Transportation Security Administration screening line and made it to the gate for their flight home to Seattle with "minutes to spare," Annen said.
As travelers face hours-long waits at some U.S. airports to clear security, they want to know what's being done to ease delays:
    When will TSA lines get shorter?
      Sometime this summer, with any luck.
      The Transportation Security Administration is trying to have 768 new security officers in place this summer, as early as mid-June, Department of Homeland Security Secretary Jeh Johnson said last week.
      Existing officers are being offered overtime to shorten the lines.
      The TSA PreCheck was 45 minutes long on Monday at Atlanta's Hartsfield-Jackson International Airport, one traveler says.
      The TSA is also asking the airlines to help with reducing the size and number of passenger carry-on bags and with "nonsecurity" work such as moving bins.
      "We are asking the American people to be patient while we bring on the added resources as quickly as possible to alleviate the wait times," said Johnson, whose agency oversees the TSA, on Friday.
      Johnson received permission from Congress to shift $34 million in his budget to increase overtime and part-time hours and to hire the additional screeners.
      Why are the lines so long?
      The long lines are a far-from-perfect storm.
      More people are flying than ever before, yet the TSA's frontline staffing budget has declined every year since fiscal year 2013.
      For fiscal year 2016, the TSA's authorized staffing level is 42,525 and passenger volume is projected to be 740 million, according to the TSA.
      There's been a 15 percent increase in passenger volume and a 10 percent drop in staffing since fiscal year 2013. Back then, the TSA's authorized staffing level was 47,147 and checkpoint volume was 643 million passengers.
      The agency's budget represents what the agency can afford, based on the congressionally-approved appropriations, according to the TSA.
      Deborah Cross was in the security line for 85 minutes on Monday at Chicago's O'Hare International Airport.