Bethesda | PLACE

BETHESDA, MD - FEBRUARY 28: U.S. President Barack Obama boards Marine One at the National Naval Medical Center February 28, 2010 in Bethesda, Maryland. Obama visited the center to undergo a physical examination done on a yearly basis. Afterwards, he visited with wounded soilders who are being treated at the facility.

BETHESDA, MD - FEBRUARY 28: U.S. President Barack Obama salutes as he boards Marine One at the National Naval Medical Center February 28, 2010 in Bethesda, Maryland. Obama visited the center to undergo a physical examination done on a yearly basis. Afterwards, he visited with wounded soilders who are being treated at the facility.

BETHESDA, MD - FEBRUARY 28: U.S. President Barack Obama departs in Marine One at the National Naval Medical Center February 28, 2010 in Bethesda, Maryland. Obama visited the center to undergo a physical examination done on a yearly basis. Afterwards, he visited with wounded soilders who are being treated at the facility.

BETHESDA, MD - FEBRUARY 28: U.S. President Barack Obama boards Marine One at the National Naval Medical Center February 28, 2010 in Bethesda, Maryland. Obama visited the center to undergo a physical examination done on a yearly basis. Afterwards, he visited with wounded soilders who are being treated at the facility.

BETHESDA, MD - FEBRUARY 28: U.S. President Barack Obama lands in Marine One at the National Naval Medical Center February 28, 2010 in Bethesda, Maryland. Obama is at the center to undergo a physical examination done on a yearly basis. Afterwards, he plans to visit with wounded warriors who are being treated at the facility.

BETHESDA, MD - FEBRUARY 28: U.S. President Barack Obama exits Marine One at the National Naval Medical Center February 28, 2010 in Bethesda, Maryland. Obama is at the center to undergo a physical examination done on a yearly basis. Afterwards, he plans to visit with wounded warriors who are being treated at the facility.

FILE - In this Feb. 28, 2010, file photo President Barack Obama returns to the White House from the National Naval Medical Center in Bethesda, Md., following a medical exam in Washington. A spate of recent reports suggest that too many Americans _ even President Obama _ are being overtreated.

President Barack Obama returns to the White House from the National Naval Medical Center in Bethesda, Md., following a medical exam, Sunday, Feb. 28, 2010, in Washington. The 48-year-old commander-in-chief signaled a thumbs-up when asked about his health.

President Barack Obama returns to the White House from the National Naval Medical Center in Bethesda, Md., following a medical exam Sunday, Feb. 28, 2010, in Washington. The 48-year-old commander-in-chief signaled a thumbs-up when asked about his health.

President Barack Obama returns to the White House from the National Naval Medical Center in Bethesda, Md., following a medical exam, Sunday, Feb. 28, 2010, in Washington. The 48-year-old commander-in-chief signaled a thumbs-up when asked about his health.

President Barack Obama strides across the South Lawn as he returns to the White House from the National Naval Medical Center in Bethesda, Md., following a medical exam, Sunday, Feb. 28, 2010, in Washington. The 48-year-old commander-in-chief signaled a thumbs-up when asked about his health.

President Barack Obama strides across the South Lawn as he returns to the White House from the National Naval Medical Center in Bethesda, Md., following a medical exam, Sunday, Feb. 28, 2010, in Washington. The 48-year-old commander-in-chief signaled a thumbs-up when asked about his health.

President Barack Obama returns to the White House from the National Naval Medical Center in Bethesda, Md., following a medical exam, Sunday, Feb. 28, 2010, in Washington. The 48-year-old commander-in-chief signaled a thumbs-up when asked about his health.

President Barack Obama boards Marine One at National Naval Medical Center in Bethesda, Md., after his first physical exam as president Sunday, Feb. 28, 2010.

President Barack Obama prepares to board Marine One at the National Naval Medical Center in Bethesda, Md., after his his first physical exam as president, Sunday, Feb. 28, 2010.

President Barack Obama departs the White House for a short helicopter trip to the National Naval Medical Center in Bethesda, Md., early Sunday morning Feb. 28, 2010 for his first scheduled physical exam as president. At 48-years-old, Obama is trim and athletic but has revealed in the past that he has a family history of cancer and that he still smokes cigarettes occasionally.

President Barack Obama, left, arrives at National Naval Medical Center in Bethesda, Md., early Sunday morning Feb. 28, 2010 for his first scheduled physical exam as president.

President Barack Obama and first lady Michelle Obama walk at Sidwell Friends School in Bethesda, Md., Wednesday, Feb. 17, 2010, where their daughter Sasha is a student.

President Barack Obama and first lady Michelle Obama walk at Sidwell Friends School, where their daughter Sasha is a student, in Bethesda, Md., Wednesday, Feb. 17, 2010.

Visitors to New York's Central Park take pictures of the Bethesda fountain during a snow storm, Wednesday, Feb. 10, 2010.