COSTELLO: Checking some top stories for you at 59 minutes past. Florida investigators say an arsonist started a fire at the mosque once attended by the Pulse Nightclub shooter. The fire broke out early this morning. Police say they have a video taken from inside the mosque that may show how the fire was started. The Orlando shooter killed 49 people at that nightclub in June. He had attended the mosque since 2003. Three people are dead after a plane crash at a Reno airport in Nevada. Officials say the small plane experienced an unknown issue after takeoff and crashed into a parking lot. All three passengers aboard were killed. No one on the ground was hurt. Of course, an investigation is underway. As the first nine NFL games kicked off, ESPN's Fantasy Sports app fumbled, putting its 7 million users in a time-out. According to its Twitter account, the fantasy app and website were partially, were partially working by 4:00 p.m. Eastern, when the second round of games kicked off. And fully restored by 6:30 on Sunday. Thank you so much for joining me today, I'm Carol Costello. AT THIS HOUR with Berman and Bolduan starts now.
Former Mosque of Pulse Nightclub Shooter Set on Fire.