A car on the Mexicali-Tijuana highway passes over a crack made by a 7.2-magnitude earthquake which struck the region on April 4. Guillermo Arias/AP
Damage after an earthquake in Mexicali, Mexico, is seen on Sunday, April 4. Jorge Rivera/AP
On April 5, a store assistant hands back change through a broken window at a store after an earthquake in Mexicali. Jorge Duenes/Reuters
Shattered windows litter the sidewalk in downtown Calexico, Calif., following a 7.2-magnitude earthquake on Sunday. Fred Greaves/Reuters
Bricks and rubble from an earthquake in Calexico, Calif., cover the sidewalk on April 4. Denis Poroy/AP
Men stand next to cracks on a street in Mexicali, Mexico, on April 5 a day after a powerful earthquake struck the region. Guillermo Arias/AP
A man sleeps in the back of his pick-up truck, fearing aftershocks, at a parking lot in Mexicali on April 5. Roads were torn up, buildings cracked, and electricity posts toppled after a 7.2-magnitude earthquake shook cities in northern Mexico and southern California, but few casualties were reported. Mexican civil protection officials said at least one man died in a collapsed house and about 100 more were injured in Sunday's quake. Jorge Duenes/Reuters
A Calexico police officer and a US border patrol agent inspect damage to a building in Calexico, Calif., on April 4, following a 7.2- magnitude earthquake. Fred Greaves/Reuters
People walk past broken storefronts in downtown Calexico, Calif., after a 7.2-magnitude earthquake on April 4. Denis Poroy/AP
A US Border Patrol vehicle blocks off Second St. in downtown Calexico, Calif., after an earthquake struck the region in the afternoon on April 4. Denis Poroy/AP
While officials agree that conditions are much improved in Sierra Leone, Liberia, and Guinea, it's unclear if this Ebola outbreak could have been responded to quicker, with less cost and suffering.
ByKrista Larson and Maria Cheng, Associated Press
A top U.N. official in the fight against Ebola greeted just three patients at one treatment center he visited this week in Sierra Leone. Families in Liberia are no longer required to cremate the remains of loved ones to halt the spread of the virulent disease.