featuring several X-Men in solo series, such as Nightcrawler, Jubilee, Madrox, X-23, Gambit and Rogue. Cable and Deadpools books were merged into one book, Cable & Deadpool. Notable additions to the X-Men have been Armor, Pixie and Warpath, while former villains such as Lady Mastermind, Mystique, and Sabretooth became members of the X-Men. Notable story arcs of this decade are "Gifted" (2004), "House of M" (2005), "Deadly Genesis" (2005–2006), "Decimation" (2006) and "Endangered Species" (2007). The X-Men were also involved in the "Civil War" and "World War Hulk" storylines. X-Men Astonishing X-Men, vol. 3 (flagship) – Cyclops leads the team of X-Men and they start presenting themselves as superheroes again. Uncanny X-Men, vol. 1 – Storm and her team continued operating as officially sanctioned mutant law enforcers (2004–2006); post Deadly Genesis, it featured Xavier taking a team to space to hunt Vulcan when he seeks vengeance on the Shi'ar Empire (2006–2007); the team returned to Earth to fight a group of rogue Morlocks (2007). X-Men, vol. 2 – Havok led a new field team consisting of Polaris, Iceman, Rogue, Gambit, Wolverine and Juggernaut (2004–2006); later featured Rogue assembling a rapid response team featuring the most dangerous X-Men former villains (2006–2007). X-Men in Training New X-Men: Academy X – the school is rebuilt after Xorn's attack and Emma Frost and Cyclops are named headmasters, organizing the student body into different squad who train together. New X-Men, vol. 2 – After House of M and Decimation, Emma Frost disbanded all former training squads and integrated those students she deemed capable of combat to a new team. Other Teams Excalibur, vol. 3 – Professor X and Magneto formed a team to rebuild the devastated mutant nation of Genosha. X-Factor, vol. 3 – a mutant detective agency founded by Madrox based on Mutant Town. New Excalibur – After Decimation, Captain Britain brings together a new team of Excalibur as the British government decided to become more pro-active with metahuman affairs. District X – Bishop is assigned to the Mutant Town to investigate rising crime rates. X-Force, vol. 2 – Cable re-assembles the team in order to stop an immortal creature called Skornn. Weapon X, vol. 2 – featured Wolverine, Fantomex and Agent Zero quest to find the recently revived John Sublime. Exiles, vol. 1 – the team learned the true nature of the Timebroker and later traveled through different realities to chase Proteus. Alpha