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.