July 30, 2007

John Yembrick Headquarters, Washington 202-358-0602 john yembrick-1@nasa gov

George Diller Kennedy Space Center, Fla 321-867-2468 george diller-1@nasa gov

MEDIA ADVISORY: 07-093

NASA STARTS SPACE SHUTTLE ENDEAVOUR COUNTDOWN AUG 4

CAPE CANAVERAL, Fla - NASA will start the launch countdown for space shuttle Endeavour's STS-118 mission at 9 p m EDT Saturday, Aug 4, at T-43 hours The countdown includes 27 hours, 3 minutes of built-in hold time leading to a preferred launch time at 7:02 p m EDT Tuesday, Aug 7 The launch window extends an additional five minutes

During the 11-day mission to the International Space Station, Endeavour's crew will add another truss segment to the expanding station, install a new gyroscope and add an external spare parts platform The flight will have at least three spacewalks It also will debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost If this system functions as expected, three additional days will be added to the STS-118 mission

A detailed list of launch countdown milestones and times is available at:

http://www nasa gov/mission_pages/shuttle/news/index html

This mission is the 119th space shuttle flight, the 20th flight for Endeavour and the 22nd U S flight to the International Space Station The mission will be Endeavour's first flight in more than four years The shuttle has undergone extensive modifications, including the addition of safety upgrades already added to shuttles Discovery and Atlantis

For more information about the STS-118 crew and mission to the space station, visit:

http://www nasa gov/shuttle

-end-

To subscribe to the list, send a message to: hqnews-subscribe@mediaservices nasa gov To remove your address from the list, send a message to: hqnews-unsubscribe@mediaservices nasa gov

The following information is a reminder of your current mailing list subscription:

You are subscribed to the following list: [list_name]

using the following email: example@example.com

You may automatically unsubscribe from this list at any time by visiting the following URL:

http://www aus-city com/cgi-bin/dada/mail cgi/u/[list]/

If the above URL is inoperable, make sure that you have copied the entire address Some mail readers will wrap a long URL and thus break this automatic unsubscribe mechanism

You may also change your subscription by visiting this list's main screen:

http://www aus-city com/cgi-bin/dada/mail cgi/list/[list]

If you're still having trouble, please contact the list owner at:

<mailto:list
admin@aus-city
com>

The following physical address is associated with this mailing list:

http://www aus-city com