"If you're in the colder climates, then one has to put the foundation walls several feet deep to get below the frost line, " Kiesling said.

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But in the Southwest, where the frost line is only about 18 inches below ground, the added incremental cost of digging out a basement would be far steeper, said the Texan.

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Ulster surged into a 21-0 half-time lead with their second try in the 32nd minute when after a line-out take by Frost, the pack drove the big lock over the line.

BBC: Edinburgh 21-27 Ulster

If McWhirter does miss out, Neil Best will come into the starting line-up with Rowan Frost drafted into the replacements.

BBC: Paul Shields in action for Ulster

He had "the most amazing smile and joy, " said Ryan Frost, a friend who bonded with Mr. Sullivan while waiting in line for a comic-book auction.

WSJ: Colorado Shooting Took Mostly Young Lives