This study is a 2-arm randomized, controlled, multi-center clinical trial to determine which of two strategies at birth are best to optimally aerate the lung of preterm infants. Specifically we will determine in 600 infants of 23-26 weeks gestational age (GA) requiring respiratory support at birth which of two lung opening strategies - either a standard PEEP/CPAP of 5-7 cm H2O in the delivery room (DR), as compared to early lung recruitment using Sustained Inflation (SI) in the DR, will result in a lower rate of the combined endpoint of death or bronchopulmonary dysplasia (BPD) at 36 weeks gestational age.