Born into wealth and a political dynasty, Senator Edward "Ted" Kennedy has devoted more than a half century to public service. Kennedy, a leading Democrat, was diagnosed with a brain tumor in May 2008. Here's a look at highlights of his career.

Right: On April 21 Kennedy reacted as President Obama spoke before he signed the Edward M. Kennedy Serve America Act, which aims to increase the ranks of AmeriCorps, create five groups to help poor people, improve education, encourage energy efficiency, strengthen access to healthcare, and assist veterans.