The top union for air traffic controllers is hampering Transportation Secretary Sean Duffy’s plans to boost hiring by penalizing those who want to work beyond retirement age, The Post has learned. Duffy is offering cash bonuses of up to 20% of annual salaries for Federal Aviation Administration (FAA) air traffic controllers eligible to retire but younger than the mandatory age of 56 — and hoping to retain even more through

We're going to build a brand-new air traffic control system — from new telecom, to new radars, to new infrastructure," Transportation Secretary Sean Duffy said.