cloud of smoke. it was so big and so loud. it shook my car when i was driving. i heard something that hit the top of my car and i hopp eped o and took a picture. reporter: you must be thinking to yourself, i went through this on monday. yes. is it another terrorist attack? was it a bomb? it was so massive. in 43 years have you ever been near a bombing before? no. and it happened twice in three days. yes. i said you ll never believe this but i ve seen another explosion and started to describe it to her. her first reaction was get home as quick as you can. reporter: that joe did, returning home to a wife and children who want him to stick around for a while.
him on his cell. it was the worst hour of my life. reporter: amy went back to her hotel. i opened the door to our hotel room and thank god there he was. tell me how you felt when you saw her. it was incredible. we were both very happy we had found each other. not knowing was the worst thing. reporter: joe and amy through back to texas to reunit with their children. joe had a business trip so he drove from austin to dallas. to get back to austin, you have to drive an interstate through this town, the town of west, x texas. he was stunned to see huge plumes of smoke. right out of the middle of the black smoke came a giant explosion. i saw a fire ball and a giant
gary tuchman has his incredible story. reporter: joe and amy look at this at a very different advantage point than others, so unique it is hard to contempl e contemplate. we feel blessed we are both okay and that we re sitting here talking to you today. reporter: joe s story begins last week in boston. he was running for a charity. this picture was taken at the finish line just seconds after he crossed. amy was 10 feet from the first explosion. reporter: was wife was very close, but not injured. meanwhile amy had no idea where her husband was and grew panicked when she couldn t reach