reuters photographers witness big stories 2017 donald trump first year u.s. president flight rohingya refugees myanmar venezuela crisis fall islamic state tower block inferno london feature present strong image also give photographers chance tell stories behind picture explain word image take talk trek night south sudan fly pacific ocean photograph total eclipse talk watch drown migrants rescue mediterranean find best vantage point capture air force one take las vegas wake bad gun massacre recent u.s. history photographers raise question show close action moments crisis take picture try help always hard come realization helpful take picture say photographer jonathan bachman image residents wad flood water tropical storm harvey houston observer suffer believe image make difference image serious course quirky fun boy enjoy mow white house lawn much ignore trump one example picture year picture story