More action! More excitement! More Transformers! Michael Bay's 'Transformers: Revenge of the Fallen' explodes into theaters June 26 '09, and only ET's Mark Steines is blogging exclusively from his private jet ride to the top-secret set in New Mexico -- where he'll give you an unprecedented first look behind the scenes of the upcoming summer blockbuster!

Shia LaBeouf, Megan Fox, Josh Duhamel and Tyrese Gibson are reunited once again with the cast of the original blockbuster, which saw mankind caught in the middle of battling Autobots and Decepticons from another galaxy. Up until now, the 'Transformers' sequel set has been off-limits, but only ET got complete access to the closed set on Holloman Air Force Base and White Sands Missile Range in New Mexico.

Stay tuned to ET for our all-'Transformers' Tuesday!