Short answers, pulled from the story.
AT&T Stadium opened for play in 2010 after construction began in earnest following January 2006. The actual construction cost rose to $1.15 billion, making it one of the most expensive sports venues ever built.
The retractable roof system was designed by structural engineering firm Walter P Moore and implemented by mechanization consultants Uni-Systems. Electrification of the roof was developed by VAHLE, Inc., allowing quick conversions to accommodate various events.
The stadium hosted Super Bowl XLV on the 6th of February 2011, where the Green Bay Packers defeated the Pittsburgh Steelers 31, 25. Attendance reached 103,219, falling 766 short of the record set in Super Bowl XIV.
The center-hung Mitsubishi video display board measures 72 feet wide and 96 feet tall. It became the largest HDTV screen in the world upon installation before being surpassed by other screens.
The unorthodox size and positioning of video boards above the field caused controversy due to interference with punts. During the first preseason game on the 21st of August 2009, a punt by Tennessee Titans player A.J. Trapasso hit the scoreboard.