Ceremony Commemorates 20th Anniversary Of Challenger Accident

CAPE CANAVERAL, FL - JANUARY 28: Jane Smith Wolcott (R) and Lona Onizuka, widows of Challenger astronauts Michael Smith and Ellison Onizuka look into the Space Mirror Memorial after a memorial service on the 20th anniversary of the Space Shuttle Challenger disaster at the Kennedy Space Center Visitor Complex January 28, 2006 in Cape Canaveral, Florida. Twenty years ago the space shuttle Challenger exploded, killing all seven astronauts onboard. (Photo by Matt Stroshane/Getty Images)