Prince Philip, the Duke of Edinburgh and husband of Queen Elizabeth II was memorialized Saturday in a funeral service, decades in the making, before being laid to rest in Windsor Castle.

Because of the pandemic, many of the usual ceremonies were dropped. After a national moment of silence, Philip's body was carried to the gates of Windsor Castle in a personalized hearse, a Land Rover that he helped modify.

It's no secret why poor countries don't have as many vaccines as rich countries.

"There's really just a scarcity of doses," says Kate Elder, senior vaccine policy adviser at Doctors Without Borders' Access Campaign. The question is, how do you fix it?