An adventure YouTuber, Joseph Brambila, went on a birthday hike up Mount Whitney in California and didn't return over one month ago. The 21-year-old had previously summited the tallest mountain in the lower 48 states in June, roughly five months before this attempt, when conditions were vastly different. In his last attempt, his efficient descent using the "glissading" technique proved fruitful but dangerous, and the wintery November conditions caused an unfortunate change of fate.