Mark McClusky says for elite athletes today, pushing boundaries and breaking records is all about "the aggregation of marginal gains."
Three years ago, Islamic terrorists attacked several locations around Mumbai, India. The siege of the city lasted more than two days, killed more than 160 and was one of the most dramatic scenes at the city’s famed Taj Mahal hotel. As the terrorists roamed the hotel looking for fresh targets, hotel employees chose not to flee. Instead, many of them risked their lives to help guests escape to safety.