ABC News’ Linsey Davis is on the ground in Texas speaking with those affected by the catastrophic floods, including a bus driver, Geri White, who helped evacuate campers from Camp Mystic.

Camp staff went to bed following what seemed like routine flood warnings. Within hours, they were fighting for survival.

In the design of unmanned aerial vehicle (UAV) wireless communications, a better understanding of propagation characteristics and an accurate channel model are required. Measurements and comprehensive ...