Five carrier rockets made their maiden flights in 2008; the Ariane 5ES, Long March 3C, Zenit-3SLB, PSLV-XL, and the operational version of the Falcon 1, with an uprated Merlin-1C engine. These were all derived from existing systems. The Blue Sparrow and Sejjil missiles also conducted their maiden flights, and the ATK Launch Vehicle made its only flight, but was destroyed by range safety after it went off course. In November, the baseline Proton-M was retired in favour of the Enhanced variant, first launched in 2007.