Wars in Europe over land have failed , she says . Kaci Hickox and her boyfriend leave a Fort Lauderdale home on foot , arriving about an hour later . Hickox says science and U.S. Constitution on her side .
Negotiations in Maine over nurse have failed , governor says . Kaci Hickox and her boyfriend leave a Fort Kent home on bikes , return about an hour later . Hickox says science and U.S. Constitution on her side .