While stationed at a media center in Homs, Syria, two award-winning journalists — American war correspondent Marie Colvin, 55, and French photojournalist Rémi Ochlik, 28 — were killed on Feb. 22 in a Syrian army rocket attack during the recent uprising against the country's president, Bashar al-Assad.

Another journalist, British photographer Paul Conroy, was seriously injured in the attack and was smuggled out of Homs a week later by...