The Rev. Jesse Jackson and U.S. Congresswoman Maxine Waters are just some of the distinguished guests who participated.
"Protect the earth, now. Boycott BP, now," Jackson told the crowd the service. "Don't pay the bill for the spill."
They stood at the pulpit as the pastor led a prayer for the tens of thousands of people in the gulf who are losing their livelihoods.
"And Lord, we don't even know yet what the long-lasting impact will be. In Jesus' name, God, we ask that you encourage them and let them know they're not by themselves," prayed the Rev. Dr. John J. Hunter, First AME Church's senior pastor.
They also asked that officials in charge of the cleanup receive the wisdom to end this environmental catastrophe.
CNS contributed to this report.
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