A black-clad gunman killed at least four people in a shooting rampage in the US state of California, before police shot him dead in a college library, officials said.

Expectant parents star in a campaign to support same-sex marriage.

NASA is tracking a large near-Earth asteroid as it passes by the Earth-Moon system on May 31st. Amateur astronomers in the northern hemisphere may be able to see the space rock for themselves during the 1st week of June. courtesy ScienceAtNASA

Declaring America at a "crossroads" in the fight against terrorism, President Barack Obama on Thursday revealed clearer guidelines for the use of deadly drone strikes.

Two men 'shot by armed police after hacking a soldier to death with machetes in a busy London street. Police treating the incident as a terror attack. Courtesy: YouTube/MrCRAT345

NZ Air Force teaching the Haka to rugby players at Model High School for the Deaf in Washington DC.

Foreign Minister Murray McCully met US Secretary of State John Kerry in Washington early today (NZ time) and most of their meeting was spent discussing the Middle East. Mr McCully offered New Zealand's support towards the peace process between the Israelis and Palestinians, which could take the form of New Zealand peacekeepers taking part in an international force to run a buffer zone between the two states.

Sandstorm over Rafha in Saudi Arabia seen from plane at 1000m altitude. Courtesy: YouTube/Jacek P

Wil Wheaton gives a message to a nerd's daughter on why it is awesome to be a nerd. Filmed at Calgary Comic Expo, April 27th 2013. courtesy Jennifer Black-Moir/YouTube

NASA's Solar Dynamics Observatory captured an X-1.7-class flare on May 13th, 2013 and STEREO-B recorded the ensuing coronal mass ejection. -- As an added bonus, a massive prominence erupted from near the southwestern limb of the Sun. Credit: NASA / SDO / STEREO

CCTV shows Mother's Day parade shooter. Courtesy: YouTube/Fernanda Souza

A drunk man charges a wild elephant While his friends cheered and encouraged him. The man runs towards the elephant, falls to the ground but gets up again and bolts in the direction of the animal. Courtesy: YouTube/Kruger Sightings

Commander Chris Hadfield has covered David Bowie's Space Oddity while on board the International Space Station.

With a breathtaking view of our planet around him, CSA Astronaut Chris Hadfield reflects upon his mission, his upcoming return to Earth and his connection with the public. Canada's first Commander of the International Space Station thanks everyone who followed and made this mission a shared experience. (Credit: CSA/NASA)

Ariel Castro appears in a Cleveland courtroom for his arraignment on rape and kidnapping charges after 3 women missing for years were found in his home.

This strange marine creature washed up dead on Pukehina Beach in the Bay of Plenty last week after some violent storms. Can anyone identify what it is? It is has a huge head and teeth with rudimentary flippers. It seems about 9M in length but the lower part of the body is probably mainly entrails from an attack. Courtesy: YouTube/Elizabeth Ann

All Time-lapse sequences were taken by the astronauts on-board the International Space Station (ISS) (Thanks guys for making this available to the public for use!) All footage has been coluor graded, denoised, deflickered, slowed down and stabilized by www.bruce-wayne-photography.com

After 17 years, they're back! Cicadas are popping up between the Carolinas and Connecticut and there's nothing you can do about them.

Eva the mascot cow is on her way back to Tauranga after being lifted more than 36,500m to the edge of space.

President Obama at the 2013 White House Correspondents' Association Dinner in Washington, D.C. April 27, 2013.

Barack Obama as Daniel Day-Lewis as Barack Obama in the Steven Spielberg movie adaption. Created for the 2013 White House Correspondents Dinner courtesy YouTube/whitehouse

A woman in California has been caught on camera dumping puppies in the rubbish.

Australian parents are considering taking legal action against McDonald's after their toddler found an unwrapped condom in a Perth restaurant - and put it in her mouth. Video / Nine News

Emirates Team New Zealand has not just left the building – they’ve taken it with them. The team’s Wynyard Quarter base, home for the past three years, has been packed into more than 70 40-foot containers and is on the way to San Francisco, courtesy of team sponsor Maersk Line

The FBI has released photos of two suspects in the Boston Marathon bombings and is asking for the public's help in identifying them. FBI Agent Richard DesLauriers says the photos came from surveillance cameras near the explosion sites. The explosions killed three people and injured more than 180. courtesy YouTube/FBI

A witness catches the moment of the explosion of the fertiliser factory in Waco, Texas. Video courtesy of YouTube.com/zidyboby

Several injuries have been reported following an explosion at a fertiliser plant near Waco, Texas. Video courtesy Youtube.com/BurgervanDreaming

CSA Astronaut Chris Hadfield performed a simple science experiment designed by grade 10 Lockview High School students Kendra Lemke and Meredith Faulkner. The students from Fall River, Nova Scotia won a national science contest held by the Canadian Space Agency with their experiment on surface tension in space using a wet washcloth. Credit: Canadian Space Agency/NASA

The team of explorers that set off for the North Pole on April 7th 2013 have reached their destination after spending a week on the Arctic sea ice. At the top of the world, they have deployed a pod carrying the Flag for the Future and a time capsule with the names of nearly three million people on the North Pole seabed. courtesy GreenpeaceVideo

A Lincoln, Nebraska bus driver accused of assaulting a passenger repeatedly punched the man before dragging him off the vehicle and leaving him on the side of a road has been fired.