21.   Trishin ran out of his house after the blast asking neighbors for help, but his wife died before rescue personnel arrived.

22.   They went door-to-door asking neighbors about hours they work and handing out special credentials for access to their homes.

23.   They have gone door-to-door asking neighbors about hours they work and handing out special credentials for access to their homes.

24.   They went door-to-door asking neighbors about the hours they work and handing out special credentials for access to their homes.