breaking his back
forget about it
what obstacles did jaime escalante have
Justin Bieber is hot.
secrecy...
The preposition "to" typically goes with the word "obstacle". For example, "There were many obstacles to overcome in completing the project."
"Insurmountable" means that something can't be overcome, as in an "insurmountable obstacle".
he acted normal and he became normal.
Galileo's biggest obstacle
Strong opposition from opponents in Congress
taylor swifts greatest obstacle to over come is being rejected by record labels
by playing other teams and getting better