Runway 4/22 at LaGuardia Airport was closed Wednesday morning after a sinkhole was identified during a routine safety inspection.The Port Authority deployed repair crews to the runway, causing significant flight delays and cancellations across major carriers.Storms are expected to worsen travel conditions while officials manage the impact of the closure on the upcoming Memorial Day holiday.This incident follows a separate fatal collision on the same runway in March that resulted in two deaths and an ongoing safety review.