Thousands gathered at Ferrell Center on the Baylor University Campus to remember those killed in the West Texas fertilizer plant explosion. President Obama was in attendance.

Mourners for a memorial service honoring those killed in the West, Texas fertilizer plant explosion line up outside the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

Mourners wait inline on South Park University Dr. for a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

Jewel Udenwatu, a health science studies sophomore, pets Mose, a comfort dog, before the start of a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. Comfort dogs travel the country to help residents emotionally recover from traumatic events. President Obama and Texas Governor Rick Perry are to attend the memorial. (Photo by Brandon Wade/EPA)

Former Woodway, Texas volunteer firefighter Mark Turner, watches a procession on South Park University Dr. before a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

Waco and Bellmead firefighters untangle the American flag before a processional on South Park University Dr. honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

Former Woodway, Texas volunteer firefighter Mark Turner, far left, uses his cellphone to take photos of a procession on South Park University Dr. before a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

An Atascocita firefighter stands at attention during a processional before the start of a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

Bynum, Texas firefighters ride atop their fire engine during a processional before a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

Firefighters and mourners stand at attention during a processional before the start of a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

Firefighters stand at attention as mourners applaud a West, Texas fire engine during a processional before the start of a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

A mourner covers her heart on South Park University Dr. during a procession of firefighters before memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

Mourners line South Park University Dr. for a procession of firefighters before memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

Firefighter honor guard members stand at attention before a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. President Obama and Texas Governor Rick Perry are to attend. (Photo by Brandon Wade/EPA)

An injured West firefighter, right, is helped to his seat before the start of a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

West emergency personal visit with an injured colleague during a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

Mourners embrace during a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

The general public and the families of those killed in the West, Texas fertilizer plant explosion attend a memorial service at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

A West firefighter reflects during a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

A mourner wipes tears away during a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

United States Senator John Cornyn delivers remarks as President Barack Obama and First Lady Michelle Obama look on during a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

President Barack Obama delivers remarks during a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

President Barack Obama and First Lady Michelle Obama attend a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

President Barack Obama reflects during a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

The Dallas firefighter Honor Guard rings a bell for each of the firefighters killed in the West, Texas fertilizer plant explosion during a memorial service at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

West Firefighters salute firefighters killed in the West, Texas fertilizer plant explosion during a memorial service at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

An Honor Guard bagpiper prepares to play Amazing Grace during a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

Honor Guard firefighters from several different departments salute the caskets of the firefighters killed in the West, Texas fertilizer plant explosion during a memorial service at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

Honor Guard firefighters from several different departments present American flags to the families of the firefighters killed in the West, Texas fertilizer plant explosion during a memorial service at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

Firefighters from several different departments present firefighter helmets to the families of the firefighters killed in the West, Texas fertilizer plant explosion during a memorial service at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

Mourners grieve during a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)

Bryce Reed pauses for a moment at his brother's, Cyrus Reed, casket after a memorial service honoring those killed in the West, Texas fertilizer plant explosion at the Ferrell Center on the Baylor University campus in Waco, Texas on 25 April 2013. (Photo by Brandon Wade/EPA)