Former American Airlines headquarters buildings imploded

Six buildings that were part of American Airlines' headquarters in the 1980s have been demolished to clear the way for a new corporate campus.

The buildings, located south of the Dallas-Fort Worth International Airport, were demolished Friday.

Hundreds of employees gathered on top of a parking garage at American's current headquarters, about a mile away, to watch the implosion of the buildings, which stood three to five stories tall.

American moved to its current headquarters in 1990. The old headquarters building was subleased but has been vacant since 2009.

After the explosion, some of the buildings were left partially standing. American Airlines said that was done to protect nearby trees. The company says the remains of those buildings will be cleared later with the rest of the debris.