Bob Butler (left) and Bob Gordon paint crosses they placed in front of American flags at Central Christian Disciples of Christ church in the city of Killeen, Texas, which is home to Fort Hood.
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SPC Ivan Lopez is pictured in the Sinai Peninsula between 2007 and 2008 during his service with the 295th Infantry of the Puerto Rico National Guard in this undated handout photo.
Sgt. First Class Erick Rodriguez stood guard at the entrance to Fort Hood as officials prepared to brief the news media about Wednesday's attack at the post.
Erich Schlegel /Reuters/Landov