With the introduction of competition from lower-cost launch providers and the annually increasing costs of ULA launches, increased attention has been paid to the amounts ULA has received for U.S. government launch contracts and for its annual government funding of US$1 billion for launch capability and readiness. This readiness requirement included the maintenance of five launch pads and a number of variants of the Delta II, Delta IV, Delta IV Heavy, and Atlas V rockets. As a result of increasing costs by ULA, in April 2012, the EELV program triggered a critical Nunn-McCurdy cost breach and a reassessment of the program, of which ULA was the sole participant.