Mercury's surface in "enhanced color," a color scheme created to emphasize color differences. This is not what Mercury would look like to the human eye, but by applying mathematical analysis to images, color differences can be accentuated beyond those visible to a person.
Mount Rushmore National Memorial under construction.
The workers had to endure conditions that varied from blazing hot to bitterly cold and windy. Each day they climbed 700 stairs to the top of the mountain to punch-in on the time clock. Then 3/8 inch thick steel cables lowered them over the front of the 500-foot face of the mountain in a "bosun chair." Despite the dangers, no one was killed during the project.
Otters in Glacier Bay National Park and Preserve, Alaska.
The sea otter population of Glacier Bay has increased dramatically in the past 20 years. Ecologists consider sea otters a keystone species here. Otters consume vast quantities of clams, urchins, crabs, and other invertebrates and their presence creates ripples through the ecosystem. NPS photo.
Every day someone like you becomes a wildland wildfire fighter, a teacher, a trail-builder, a museum curator, or a park ranger. Discover your opportunities in national parks. Come to play. Come to learn. Come to serve. Develop your environmental leadership skills. Find a job. Be the next generation to preserve and protect these great places.
With more than 80% of Americans living in urban areas, urban parks are more important than ever. The father of American landscape architecture, Frederick Law Olmsted, said of urban parks:
It is one great purpose of the Park to supply to the hundreds of thousands of tired workers, who have no opportunity to spend their summers in the country, a specimen of God's handiwork that shall be to them, inexpensively, what a month or two in the White Mountains or the Adirondacks is, at great cost, to those in easier circumstances.
Statement of Secretaries Salazar and Chu on the Permanent Plugging of Macondo well
Office of the Secretary
Last edited 4/25/2016
WASHINGTON, DC — Secretary of the Interior Ken Salazar and Energy Secretary Steven Chu today issued the following statement regarding the permanent plugging of BP's Macondo well.
“With the successful first intercept by the relief well and our confirmation through pressure tests that the cement plugs are secure, we can now declare BP's Macondo well effectively dead. At the direction of President Obama and under the leadership of National Incident Commander Thad Allen, we have worked tirelessly and relentlessly as a US Team to reach this point and to provide oversight and direction to the source control effort.”
“We are proud of our government team which played such a key role in ensuring the successful killing of the Macondo well, including USGS Director Marcia McNutt, former Sandia National Laboratories Director Tom Hunter, the many leading scientists from our National Labs, academia, and the private sector, along with the professionals of the Bureau of Ocean Energy Management, Regulation and Enforcement, who have been working non-stop since April 20th. The best minds in the public and private sectors came together to ensure that science and sound regulatory oversight guided every step of the well control efforts, and that redundancies and safeguards were in place to protect against further damage to the environment or additional risks to human life.”
“Though our source control mission is complete, President Obama has made it clear the administration will not rest until all the oil is cleaned up and the Gulf Coast is restored.”
The Bureau of Ocean Energy Management, Regulation and Enforcement (BOEM) has confirmed that the cementing operation on the Macondo well was successful, that the well has been permanently sealed with cement plugs, and that pressure tests verify integrity of the plugs.
Oversight of the well now transitions from the National Incident Command to BOEM under a process laid out in the National Response Framework.
The Department of the Interior and BOEM will oversee the continuing decommissioning of the Macondo well and its associated relief wells.
The relief wells will be plugged and decommissioned accorded to the regulatory guidelines that require the setting of multiple cement plugs and testing of plugs. More information about those regulations can be found here: www.boemre.gov
Before proceeding with the decommissioning of the relief wells, BP will be required to submit to BOEM an Application for Permit to Modify (APM) for approval that outlines its procedures to permanently plug the relief well.