In recognition of the lab’s 50th-anniversary year, the first 50 individuals to visit the Fermilab Travel Office in person today will each receive a voucher for a free, one-way flight. Some restrictions apply. Winners may fly either from Midway to O’Hare or from O’Hare to Midway. Economy class only. Winners may not select a special meal and must take what the airline offers. Flights must depart between midnight and 5 a.m.