A nation mourns
While investigators search for evidence at the crime scene and gather more details on the killer's claimed allegiance to militant group Islamic State, a shocked nation mourns the victims of the massacre at the Pulse nightclub in Orlando, Florida.
Fifty, including 29-year-old gunman Omar Mateen, were killed at the nightclub, which catered to the LGBT community. It was the deadliest mass shooting in modern U.S. history.
-By CNBC's Adam Jeffery
Posted 12, June 2016
The Pulse
An aerial view of Pulse, a popular nightclub for the LGBT community.
Orlando mourns
Friends of people who were at Pulse leave Orlando Regional Medical Center on Sunday.
FBI on scene
An FBI agent investigates outside the nightclub on Sunday.
Police protection
A bullet hole in a Kevlar helmet worn by an Orlando police officer involved in the gunfight with Mateen. The helmet saved the officer's life after he was hit a stray bullet.
FBI investigation of the shooter
Police stand in front of a house in Port St. Lucie, Florida, that officials indicated was linked to Mateen.
President Obama confronts another mass shooting
President Barack Obama leaves the Brady Press Room after addressing the nation on Sunday. This is the 15th mass shooting Obama has addressed during his presidency, and he called again on Congress for greater gun control.
FBI addresses domestic terrorism
FBI assistant special agent in charge Ron Hopper (C), law enforcement and local community leaders speak during a press conference on Sunday in Orlando.
Pride and sorrow
At Sunday's 46th annual Los Angeles Gay Pride Parade in West Hollywood, California, Kristen Jaeger holds a sign of remembrance for the Orlando victims.
New York vigil
A child places a paper flower at Manhattan's Stonewall Inn during a vigil for the Orlando victims. A police raid on the gay establishment in June 1969 led to a riot, helping to birth to the gay-rights movement.
Stop the hate
Orlando residents Arissa Suarez (L) and Malcom Crawson attend a vigil at Lake Eola Park in Orlando.
A nation mourns another mass shooting
Flags at the Washington Monument fly at half staff to honor those killed in last weekend's shootings at a gay club in Orlando, Florida, in Washington, DC, U.S. June 13, 2016.