Fact#1
"Flight to you" team has not been to Singapore.
If they have, they would know that Singapore does not have a mountain or hill near Changi International Airport. The nearest mountain in our neighbouring countries are also not visible from Changi International Airport.

Fact#2
'Saigon' control tower voice recording in English are of indian accent, which is not correct. Vietnam people's English will not have Indian Accent at all.

Fact#3
How can the 'Saigon' control tower voice recording be one sided conversation. The plot is far-fetched. It is unbelievable that top management or pilots will believed such an evidence.