As It Happens - Monday Edition

Part 1 

At two a.m. on Sunday, Pulse nightclub in Orlando, Florida posted an urgent message online: "Everyone get out of Pulse and keep running." For dozens of people inside the LGBT club, it was too late

We speak with the owner of a nearby LGBT club in Orlando -- who says the killer tried to "friend" him on Facebook just days ago, and may have originally planned to target his  club instead. 

Jason Josaphat called his mother from inside the club when the shooting started. She didn't hear from him again. Daphne Josaphat shares her memories of her young nephew. 

Part 2

Orlando Imam Muhammad Musri hasn't just been publicly decrying the massacre -- he went to Pulse nightclub as soon as he heard. We'll find out why he went, why he stayed, and what he's learned so far.

It's a jungle in there. So it took laser-scanning technology for archaeologists to make a mind-boggling discovery: a vast network of lost, centuries-old lost cities, hidden under the jungle floor of Cambodia. 

Part 3 

Float like a mantis shrimp, sting like a bee. Thing is, though, that sting -- the shrimp's explosive punching ability -- should  actually explode the creature itself. Now, scientists have discovered why it doesn't. 

A New Jersey town opens a beautiful new dog park with an unusual policy: no dogs allowed.