It makes you wonder why teams don't use the tactic on every play.

WSJ: NFL: The 49ers Defensive Effort Falls Short

"I was a history major for three years in college, and it makes me wonder why we don't learn more about it in America, " he says.

BBC: Magazine

Wednesday's Supreme Court argument about whether to regulate carbon dioxide from auto emissions might have made you wonder why we don't just remove the greenhouse gas from auto exhaust the way we do a lot of other pollutants.

NPR: Has the Move to Make Cars Greener Stalled?