President Barack Obama ordered U.S. flags in West Virginia to be flown at half staff this week in honor of those killed in the April 5 mining disaster.
Memorial services continue for the 29 men who worked at the Upper Big Branch mine. The mine is being vented of gases so crews can recover all of the bodies.
The recent blast marked the worst mining disaster in nearly 30 years.
"We waited to hear about the four that were missing," Beckley, W. Va., resident Janet Walton said. "Actually one of those was my son-in-law's uncle, Jodie Price. And we've just been in prayer all week and just believe in God, still believe in God to carry us through."
On Monday, a team of federal investigators were working to find out what caused the disaster.
Authorities say high levels of volatile methane gas may have played a role.
Gov. Joe Manchin, D-W. Va., observed a moment of silence at 3:30 p.m. Monday to commemorate the victims of the deadly mine blast.
Also, Gov. Bob McDonnell, R-Va., has asked Virginians to join the observance and continue finding ways to help their West Virginia neighbors during this tragic time.