Great question from Manish Achuth. Thanks saar!

Who wrote this telegram? And after what?

With this question, we are back on schedule! yay!

Cracked by: rickde , Sumanth Patlolla , Jayaprakash B R , Manish Achuth , tanwi , Bharath , Rogi , aarjav , vinayaknp , Shwetha Maiya and Dibyo

Answer:
Wright brothers wrote this to their father after their successful flight from Kitty Hawk