President Obama lays wreath at Kennedy gravesite (16 images)

President Barack Obama, First Lady Michelle Obama and former President Bill Clinton lay a wreath at the gravesite for President John F. Kennedy at Arlington National Cemetery in Arlington, Virginia, November 20, 2013. This Friday will mark the 50th anniversary of the assassination of President Kennedy. UPI/Pat Benic

President Barack Obama (2nd-L), First Lady Michelle Obama (L), Former President Bill Clinton (2nd-R) and Former Secretary of State Hillary Clinton lay a wreath at the gravesite for President John F. Kennedy at Arlington National Cemetery in Arlington, Virginia, November 20, 2013. This Friday will mark the 50th anniversary of the assassination of President Kennedy on November 22, 1961. UPI/Pat Benic

President Barack Obama and First Lady Michelle Obama lay a wreath at the gravesite for President John F. Kennedy at Arlington National Cemetery in Arlington, Virginia, November 20, 2013. This Friday will mark the 50th anniversary of the assassination of President Kennedy on November 22, 1963. UPI/Pat Benic

President Barack Obama and First Lady Michelle Obama looks at quotes inscribed at the at the gravesite for President John F. Kennedy, after laying a wreath, at Arlington National Cemetery in Arlington, Virginia, November 20, 2013. This Friday will mark the 50th anniversary of the assassination of President Kennedy. UPI/Pat Benic