Today's 10 Must-See Photos: 4-4-2013

Astronaut Chris Hadfield tweeted this photo of Belle Island, Newfoundland, from the International Space Station on April 4. He wrote, "Belle Isle, Newfoundland - natural icebreaker at the mouth of the Strait. pic.twitter.com/FnQGZtnjRC"

Astronaut Chris Hadfield tweeted this photo of the cupola from the International Space Station on April 4. He wrote, "The Cupola, our window on the world. pic.twitter.com/EG9q4PlCzJ"

On March 17, NASA's Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) acquired this image of the Napo River in Ecuador and Peru. The colors indicate the likelihood of flooding beneath the forest canopy, which is difficult to determine using traditional sensors. 

Astronaut Chris Hadfield tweeted this photo of a spiral cloud from the International Space Station on April 3. He wrote, "Tonight's Finale: Test your knowledge! Did this spiral cloud form north or south of the Equator? pic.twitter.com/723fjCjtRX"

A plaque below the balcony at the former Lorraine Motel, now a part of the National Civil Rights Museum, in Memphis, Tenn., commemorates the life of Dr. Martin Luther King Jr. on April 4, 2013. A wreath marks the place where King was assassinated on April 4, 1968.

Astronaut Thomas H. Marshburn tweeted this photo of San Miguel de Tucuman, Argentina, from the International Space Station on April 4. He wrote, "The city of San Miguel de Tucuman, Argentina, nestled at the base of the Andes pic.twitter.com/cchuQEdtyK"

The Marine One helicopter is framed by blooming Magnolia trees as President Barack Obama lifts off from the South Lawn at the White House in Washington, on April 3.

Astronaut Chris Hadfield tweeted this photo of Geneva, Switzerland, near the CERN particle accelerator from the International Space Station on April 3. He wrote, "Geneva, Switzerland. Under that rock is the incredible CERN particle accelerator. Their AMS is mounted on Station. pic.twitter.com/Mtk4G4unCf"