5 Things to Know This Morning

April 4, 2013— -- Your look at the five biggest and most buzz-worthy stories of the morning.

1. 1 Army Civilian Employee Dead in Fort Knox Shooting
An Army civilian employee was killed after a shooting outside the U.S. Army Human Resources Command headquarters in Fort Knox, Ky., on Wednesday. The base was placed on lockdown following the incident and lifted an hour later.

2. Images Show Expansion of NKorea's Nuclear Complex
Satellite images show new construction at a plutonium production reactor at a nuclear complex in North Korea that was shut down in 2007. Once operational, the reactor is capable of producing six kilograms of plutonium a year.

3. 2 With Gang Tie Sought in Colo. Murders
Authorities are looking for two alleged members of a white supremacist prison gang after their name was brought up during an investigation in the murder of Tom Clements. At this time, the men are not being called suspects in the killing of the Colorado prison chief.

4. SUV Falls Off Atlanta Overpass
An SUV fell at least 30 feet off an overpass in the Atlanta area and landed upright on the ground below after the driver had a medical emergency. All three passengers are expected to be okay.

5. Paris Using Sheep to Mow Grass
The mayor of Paris began an "eco-grazing" effort earlier this week, employing four black sheep to "mow" the grass in a small city park. The sheep will help prevent the use of loud, gas-guzzling lawn mowers.