In every instance, he took on complex and vital challenges under tough deadlines. (ij.org)
Communicating a better understanding of the sector may prove her most vital challenge. (canadianbusiness.com)
I've used the words «vital challenge to the Church» more often than I should have, and suggested a «third way response» enough times to have reasonably expected a lawsuit from Third Way magazine. (premierchristianity.com)