President Obama and Michelle Obama, the first lady, prepare to board Air Force One at Andrews Air Force Base, Md., on April 29, as they traveled to Tuscaloosa, Ala. to visit tornado damaged areas. Charles Dharapak/AP
This aerial photo shows the devastation of the Cedar Crest and Forest Lake neighborhoods in Tuscaloosa, Ala. on April 28. Dusty Compton/The Tuscaloosa News/AP
Jerry Stewart looks at some photographs to see if they belong to his son after a tornado hit the day before in Pleasant Grove just west of downtown Birmingham, Ala., on April 28. Butch Dill/AP
A recreational vehicle is overturned and flattened in Rainsville, Ala., on April 28. Mark Almond/Birmingham News/AP
A tornado moves through Tuscaloosa, Ala., on April 27. A wave of severe storms laced with tornadoes strafed the South, killing at least 16 people around the region and splintering buildings across swaths of an Alabama university town. Dusty Compton/The Tuscaloosa News/AP
Residents survey the destruction after a tornado hit Pratt City, Ala., just north of downtown Birmingham, on April 27. Butch Dill/AP
Michael Dunn is hugged by his mother, Patricia Dunn, as they stand in the road where his house was completely destroyed after a tornado touched down on April 27 in Concord, Ala. Jeff Roberts/Birmingham News/AP
John Segars' Heating and Air business was destroyed in Concord, Ala., after what appeared to be a tornado ripped through parts of the town on April 27. The damage in the area is extensive, with homes and businesses destroyed and people injured. Jeff Roberts/Birmingham News/AP
Bystanders look on at storm damage along 15th Street in Tuscaloosa, Ala., on April 27. Dusty Compton/The Tuscaloosa News/AP
Homes and businesses are completely destroyed along 15th St. in Tuscaloosa, Ala., on April 27. Dusty Compton/The Tuscaloosa News/AP
People walk past destroyed homes and businesses along McFarland Blvd. in Tuscaloosa, Ala., on April 27. Dusty Compton/The Tuscaloosa News/AP
Judy Cook, who lost her Masters Drive home, is comforted by Chase Spradlin in Concord, Ala., on April 27. Jeff Roberts/Birmingham News/AP
Hardline Islamist insurgents, including the Al Qaeda-linked Nusra Front, now control a second Syrian province after Raqqa, the stronghold of the Islamic State group. But ISIS isn't allied with the Islamists who tookover Idlib.
ByMariam Karouny, Reuters
Islamist groups including Al Qaeda's Nusra Front - but not ISIS - have seized the city of Idlib for the first time in Syria's civil war, fighters and a monitoring group said on Saturday.