After Kimberly Ladd's life was turned upside-down by opioid addiction, she vowed to make it easier for other people to get help
Dr. Ala Stanford took to the streets to eliminate the "barrier on top of barrier" that prevented her people from getting the help they deserved
Alison Sawyer Current has transformed Isla Mujeres by providing over 20,000 free spay/neuter procedures for the island's stray pets
Inside One Man's Search for the Stranger Who Saved Him From Suicide: ‘I Wasn’t Even Sure He Was Real’
Mark Henick reunited with his savior Mike Richey in 2015
Naughty or nice? Eh, it doesn't matter – these stars couldn't get any cuter in their photos from holidays past
Serena Williams Unsure How Playing Without Fans at U.S. Open Will Affect Her: 'A Wild Experience'
"I've always played with such a big crowd," Serena Williams tells PEOPLE in this week's issue